diff --git a/2019-05-04/Readme.md b/2019-05-04/Readme.md
new file mode 100644
index 0000000..ee4bb88
--- /dev/null
+++ b/2019-05-04/Readme.md
@@ -0,0 +1 @@
+# Live Coding @ Woot Devices 4
diff --git a/2019-05-04/elie1.frag b/2019-05-04/elie1.frag
new file mode 100644
index 0000000..e2b0fa4
--- /dev/null
+++ b/2019-05-04/elie1.frag
@@ -0,0 +1,60 @@
+precision mediump float;
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D backbuffer;
+
+float sat(float x) { return clamp(x,0.,1.); }
+
+const float bpm = 80.;
+
+mat2 rot(float r) {
+  float c = cos(r);
+  float s = sin(r);
+  return mat2(c, s, -s, c);
+}
+
+float sc(vec3 p, vec2 uuv) {
+
+  p.xy *= rot(time);
+
+  float bt = pow(1.-fract(.0+time*bpm/60.), 4.);
+  float bt2 = pow(1.-fract(.0+time*bpm/60.), .5);
+  float r = mix(.1, .3, bt);
+
+  float a = atan(uuv.y, uuv.x);
+  r += (sin(a * 10.) * bt2 * .5+.5) * .1;
+
+  r *= 0.5;
+
+  vec3 id = floor(p*2.);
+  p = (fract(p*2.)-.5)/2.;
+  r *= 1./length(dot(id,vec3(.9)));
+  return length(p) - r;
+}
+
+void main() {
+  vec2 uv = (gl_FragCoord.xy/resolution);
+  vec2 uuv = (gl_FragCoord.xy * 2. - resolution) / max(resolution.x, resolution.y);
+  vec3 p = vec3(0.,0.,-1.);
+  vec3 d = vec3(uuv, 1.0);
+  float off = 0.;
+  float s;
+
+  for (float i = 0.; i < 1. ; i += .01) {
+    s = sc(p, uuv);
+    if (s < 0.01) break;
+    p += s * d;
+    off = i;
+  }
+
+  off *= 1.9;
+
+  float t0 = 1447.259;
+  float t1 = t0 + 5.;
+  float fac = mix(.2,.8,sat(smoothstep(t0,t1,time)));
+  vec3 col = .5+vec3(.5,.5,.5)*cos(6.28*(vec3(.1,time*.1,.6) + uv.x + off + time*.1));
+
+  //col *= smoothstep(0.,.01,);
+
+  gl_FragColor = mix(texture2D(backbuffer, gl_FragCoord.xy/resolution), vec4(col, 1.0), .2);
+}
diff --git a/2019-05-04/elie2.frag b/2019-05-04/elie2.frag
new file mode 100644
index 0000000..6aceea3
--- /dev/null
+++ b/2019-05-04/elie2.frag
@@ -0,0 +1,89 @@
+/*{"audio":true, "midi": true}*/
+precision mediump float;
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D backbuffer;
+uniform float volume;
+uniform sampler2D midi;
+
+float sat(float x) { return clamp(x,0.,1.); }
+
+const float bpm = 130.*1.;
+
+mat2 rot(float r) {
+  float c = cos(r);
+  float s = sin(r);
+  return mat2(c, s, -s, c);
+}
+
+float sc(vec3 p, vec2 uuv) {
+
+  p.yx *= rot(time*.5);
+  p.yz *= rot(time*.1);
+
+  float bt = pow(1.-fract(.4+time*bpm/60.), 4.);
+  float bt2 = pow(1.-fract(.4+time*bpm/60.), .5);
+  float r = mix(.1, .3, bt);
+
+  p.xy *= rot((abs(bt2-.5)+.5) * .1);
+
+  float a = atan(uuv.y, uuv.x);
+  r += (sin(a * 10.) * bt2 * .5+.5) * .1;
+  //r += (sin(a * 50.) * bt2 * .5+.5) * 1.2 * volume;
+
+  r *= 0.5;
+
+  vec3 id = floor(p*2.);
+  p = (fract(p*2.)-.5)/2.;
+  float r2 = r;
+  //r *= 1./(.1+length(dot(id,vec3(1.5))));
+  vec3 p2 = p;
+  //p2.xy = rot(time + p2.z*10.)*p2.xy;
+  //p2.x += uuv.x*.1;
+  p.xz = rot(bt) * p.xz;
+  p.y += atan(p.z)*.1;
+
+  p *=10.1;
+  //p -= .5;
+  float box = max(p.x, max(p.y, p.z));
+  return box;
+  return min(length(p) - r, max(length(p2.xz) - r2*5.5, abs(p.z-4.)-3.));
+}
+
+void main() {
+  vec2 uv = (gl_FragCoord.xy/resolution);
+  vec2 uuv = (gl_FragCoord.xy * 2. - resolution) / max(resolution.x, resolution.y);
+  vec3 p = vec3(0.,0.,-1.);
+  vec3 d = vec3(uuv, 1.0);
+  float off = 0.;
+  float s;
+
+  for (float i = 0.; i < 1. ; i += .01) {
+    s = sc(p, uuv);
+    if (s < 0.001) break;
+    p += s * d;
+    off = i;
+  }
+
+  off *= 2.5;
+
+  float t0 = 2755.312;
+  float t1 = t0 + 10.;
+  float fac = mix(.2,.5,sat(smoothstep(t0,t1,time)));
+  vec3 col = vec3(.7,.5,.3)+vec3(.5,fac,.5)*cos(6.28*(vec3(.1,.3,.4) + uv.x + off + time*.1));
+
+  //col *= smoothstep(0.,.01,);
+  float bt = pow(1.-fract(.4+time*bpm/60.), 4.);
+  float f = texture2D(midi, vec2(1./90.,1.), 0.).r;
+
+  float md1 = texture2D(midi, vec2(.69, .49), 0.).x;
+
+
+  float rad = mix(.4,mix(.1,.8,md1),bt);
+  float st = 6.;
+  rad += pow(sin((atan(uuv.y, uuv.x)+.5*time)*5.)*st+.5, 10.)*bt*.3;
+  rad -= pow(sin((atan(uuv.y, uuv.x)+3.1415+.5*time)*st)*.5+.5, 1.)*bt*.1;
+  col *= smoothstep(.0,.005, length(uuv)-rad);
+
+  gl_FragColor = mix(texture2D(backbuffer, gl_FragCoord.xy/resolution), vec4(col, 1.0), .3);
+}
diff --git a/2019-05-04/elie3.frag b/2019-05-04/elie3.frag
new file mode 100644
index 0000000..8439987
--- /dev/null
+++ b/2019-05-04/elie3.frag
@@ -0,0 +1,103 @@
+/*{"audio":true, "midi": true}*/
+precision mediump float;
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D backbuffer;
+uniform float volume;
+uniform sampler2D midi;
+
+float sat(float x) { return clamp(x,0.,1.); }
+
+const float bpm = 60.*1.;
+
+mat2 rot(float r) {
+  float c = cos(r);
+  float s = sin(r);
+  return mat2(c, s, -s, c);
+}
+
+float sc(vec3 p, vec2 uuv) {
+
+  p.yx *= rot(time*.5);
+  p.yz *= rot(time*.1);
+
+  float bt = pow(1.-fract(.4+time*bpm/60.), 4.);
+  float bt2 = pow(1.-fract(.4+time*bpm/60.), .5);
+  float r = mix(.1, .3, bt);
+
+  p.xy *= rot((abs(bt2-.5)+.5) * .1);
+
+  float a = atan(uuv.y, uuv.x);
+  r += (sin(a * 10.) * bt2 * .5+.5) * .1;
+  //r += (sin(a * 50.) * bt2 * .5+.5) * 1.2 * volume;
+
+  r *= 0.5;
+
+  vec3 id = floor(p*2.);
+  p = (fract(p*2.)-.5)/2.;
+  float r2 = r;
+  //r *= 1./(.1+length(dot(id,vec3(1.5))));
+  vec3 p2 = p;
+  //p2.xy = rot(time + p2.z*10.)*p2.xy;
+  //p2.x += uuv.x*.1;
+  p.xz = rot(bt) * p.xz;
+  p.y += atan(p.z)*.1;
+
+  p *=10.1;
+
+  p.xz = rot(bt) * p.xz;
+
+  //p -= .5;
+  float box = max(p.x, max(p.y, p.z));
+  return box;
+  return min(length(p) - r, max(length(p2.xz) - r2*5.5, abs(p.z-4.)-3.));
+}
+
+void main() {
+  vec2 uv = (gl_FragCoord.xy/resolution);
+  vec2 uuv = (gl_FragCoord.xy * 2. - resolution) / max(resolution.x, resolution.y);
+  vec3 p = vec3(0.,0.,-1.);
+  vec3 d = vec3(uuv, 1.0);
+  float off = 0.;
+  float s;
+
+  for (float i = 0.; i < 1. ; i += .01) {
+    s = sc(p, uuv);
+    if (s < 0.001) break;
+    p += s * d;
+    off = i;
+  }
+
+  off *= 2.5;
+
+  float t0 = 2755.312;
+  float t1 = t0 + 10.;
+  float fac = mix(.2,.5,sat(smoothstep(t0,t1,time)));
+  vec3 col = vec3(.7,.5,.3)+vec3(.5,fac,.5)*cos(6.28*(vec3(.1,.3,.4) + uv.x + off + time*.1));
+
+  //col *= smoothstep(0.,.01,);
+  float bt = pow(1.-fract(.3+time*bpm/60.), 4.);
+  float f = texture2D(midi, vec2(1./90.,1.), 0.).r;
+
+  float md1 = texture2D(midi, vec2(.69, .48), 0.).x;
+  float md2 = texture2D(midi, vec2(.69, .49), 0.).x;
+
+  uuv = rot(time*.1) * uuv;
+  uuv = fract(uuv*2.)-.5;
+  vec2 idx = floor(uuv*2.);
+
+  float rad = mix(.4,mix(.1,.8,md1),bt);
+
+  rad += abs(idx.x)*.0;
+
+  float st = 24.*md2;
+  rad += pow(sin((atan(uuv.y, uuv.x)+.5*time)*st)*.5+.5, 10.)*bt*.3;
+  rad -= pow(sin((atan(uuv.y, uuv.x)+3.1415+.5*time)*st)*.5+.5, 1.)*bt*.1;
+
+  rad += pow(sin((atan(uuv.y, uuv.x)+1.*time)*st*10.)*.5+.5, 10.)*bt*.1;
+
+
+  col *= mix(1., smoothstep(.0,.005, length(uuv)-rad), md1*2.);
+
+  gl_FragColor = mix(texture2D(backbuffer, gl_FragCoord.xy/resolution), vec4(col, 1.0), .3);
+}
diff --git a/2019-05-04/elie4.frag b/2019-05-04/elie4.frag
new file mode 100644
index 0000000..780371b
--- /dev/null
+++ b/2019-05-04/elie4.frag
@@ -0,0 +1,114 @@
+/*{"audio":true, "midi": true}*/
+precision mediump float;
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D backbuffer;
+uniform float volume;
+uniform sampler2D midi;
+
+float sat(float x) { return clamp(x,0.,1.); }
+
+const float bpm = 75.*1.;
+
+mat2 rot(float r) {
+  float c = cos(r);
+  float s = sin(r);
+  return mat2(c, s, -s, c);
+}
+
+float sc(vec3 p, vec2 uuv) {
+
+  p.yx *= rot(time*.5);
+  p.yz *= rot(time*.1);
+
+  float bt = pow(1.-fract(.4+time*bpm/60.), 4.);
+  float bt2 = pow(1.-fract(.4+time*bpm/60.), .5);
+  float r = mix(.1, .3, bt);
+
+  p.xy *= rot((abs(bt2-.5)+.5) * .1);
+
+  float a = atan(uuv.y, uuv.x);
+  r += (sin(a * 10.) * bt2 * .5+.5) * .1;
+  //r += (sin(a * 50.) * bt2 * .5+.5) * 1.2 * volume;
+
+  r *= 0.5;
+
+  vec3 id = floor(p*2.);
+  p = (fract(p*2.)-.5)/2.;
+  float r2 = r;
+  //r *= 1./(.1+length(dot(id,vec3(1.5))));
+  vec3 p2 = p;
+  //p2.xy = rot(time + p2.z*10.)*p2.xy;
+  //p2.x += uuv.x*.1;
+  p.xz = rot(bt) * p.xz;
+  p.y += atan(p.z)*.1;
+
+  p *=10.1;
+
+  float md3 = texture2D(midi, vec2(.69, .47), 0.).x;
+  p.xy = rot(md3) * p.xy*3.;
+
+  //p -= .5;
+  float box = max(p.x, max(p.y, p.z));
+  return box;
+  return min(length(p) - r, max(length(p2.xz) - r2*5.5, abs(p.z-4.)-3.));
+}
+
+void main() {
+  vec2 uv = (gl_FragCoord.xy/resolution);
+  vec2 uuv = (gl_FragCoord.xy * 2. - resolution) / max(resolution.x, resolution.y);
+  vec3 p = vec3(0.,0.,-1.);
+  vec3 d = vec3(uuv, 1.0);
+  float off = 0.;
+  float s;
+
+  for (float i = 0.; i < 1. ; i += .01) {
+    s = sc(p, uuv);
+    if (s < 0.001) break;
+    p += s * d;
+    off = i;
+  }
+
+  off *= 2.5;
+
+  float t0 = 2755.312;
+  float t1 = t0 + 10.;
+  float fac = mix(.2,.5,sat(smoothstep(t0,t1,time)));
+  vec3 col = vec3(.7,.5,.3)+vec3(.5,fac,.5)*cos(6.28*(vec3(.1,.3,.4) + uv.x + off + time*.1));
+
+  //col *= smoothstep(0.,.01,);
+  float bt = pow(1.-fract(.2+time*bpm/60.), 4.);
+  float f = texture2D(midi, vec2(1./90.,1.), 0.).r;
+
+  float md1 = texture2D(midi, vec2(.69, .48), 0.).x;
+  float md2 = texture2D(midi, vec2(.69, .49), 0.).x;
+
+  vec2 uuv2 = uuv;
+
+  uuv = rot(time*.2+pow(length(uuv)*.5,5.)*53.) * uuv;
+  uuv = fract(uuv*2.)-.5;
+  vec2 idx = floor(uuv*2.);
+
+  float rad = mix(.4,mix(.1,.8,md1),bt);
+
+  rad += abs(idx.x)*.0;
+
+  float st = 24.*md2;
+  rad += pow(sin((atan(uuv.y, uuv.x)+.5*time)*st)*.5+.5, 10.)*bt*.3;
+  rad -= pow(sin((atan(uuv.y, uuv.x)+3.1415+.5*time)*st)*.5+.5, 1.)*bt*.1;
+
+  rad += pow(sin((atan(uuv.y, uuv.x)+1.*time)*st*10.)*.5+.5, 10.)*bt*.1;
+
+ float dd = length(uuv)-rad;
+
+  dd = max(dd, -(length(uuv)-rad*.5));
+
+  col *= mix(1., smoothstep(.0,.005, dd), md1*2.);
+
+  t0 = 5781.261;
+  t1 = t0 + 10.;
+  fac = mix(1.,-1.,sat(smoothstep(t0,t1,time)));
+  col = mix(col, vec3(col.r), smoothstep(.0,.005,uuv2.x+fac));
+
+  gl_FragColor = mix(texture2D(backbuffer, gl_FragCoord.xy/resolution), vec4(col, 1.0), .3);
+}
diff --git a/2019-05-04/elie5.frag b/2019-05-04/elie5.frag
new file mode 100644
index 0000000..780371b
--- /dev/null
+++ b/2019-05-04/elie5.frag
@@ -0,0 +1,114 @@
+/*{"audio":true, "midi": true}*/
+precision mediump float;
+uniform vec2 resolution;
+uniform float time;
+uniform sampler2D backbuffer;
+uniform float volume;
+uniform sampler2D midi;
+
+float sat(float x) { return clamp(x,0.,1.); }
+
+const float bpm = 75.*1.;
+
+mat2 rot(float r) {
+  float c = cos(r);
+  float s = sin(r);
+  return mat2(c, s, -s, c);
+}
+
+float sc(vec3 p, vec2 uuv) {
+
+  p.yx *= rot(time*.5);
+  p.yz *= rot(time*.1);
+
+  float bt = pow(1.-fract(.4+time*bpm/60.), 4.);
+  float bt2 = pow(1.-fract(.4+time*bpm/60.), .5);
+  float r = mix(.1, .3, bt);
+
+  p.xy *= rot((abs(bt2-.5)+.5) * .1);
+
+  float a = atan(uuv.y, uuv.x);
+  r += (sin(a * 10.) * bt2 * .5+.5) * .1;
+  //r += (sin(a * 50.) * bt2 * .5+.5) * 1.2 * volume;
+
+  r *= 0.5;
+
+  vec3 id = floor(p*2.);
+  p = (fract(p*2.)-.5)/2.;
+  float r2 = r;
+  //r *= 1./(.1+length(dot(id,vec3(1.5))));
+  vec3 p2 = p;
+  //p2.xy = rot(time + p2.z*10.)*p2.xy;
+  //p2.x += uuv.x*.1;
+  p.xz = rot(bt) * p.xz;
+  p.y += atan(p.z)*.1;
+
+  p *=10.1;
+
+  float md3 = texture2D(midi, vec2(.69, .47), 0.).x;
+  p.xy = rot(md3) * p.xy*3.;
+
+  //p -= .5;
+  float box = max(p.x, max(p.y, p.z));
+  return box;
+  return min(length(p) - r, max(length(p2.xz) - r2*5.5, abs(p.z-4.)-3.));
+}
+
+void main() {
+  vec2 uv = (gl_FragCoord.xy/resolution);
+  vec2 uuv = (gl_FragCoord.xy * 2. - resolution) / max(resolution.x, resolution.y);
+  vec3 p = vec3(0.,0.,-1.);
+  vec3 d = vec3(uuv, 1.0);
+  float off = 0.;
+  float s;
+
+  for (float i = 0.; i < 1. ; i += .01) {
+    s = sc(p, uuv);
+    if (s < 0.001) break;
+    p += s * d;
+    off = i;
+  }
+
+  off *= 2.5;
+
+  float t0 = 2755.312;
+  float t1 = t0 + 10.;
+  float fac = mix(.2,.5,sat(smoothstep(t0,t1,time)));
+  vec3 col = vec3(.7,.5,.3)+vec3(.5,fac,.5)*cos(6.28*(vec3(.1,.3,.4) + uv.x + off + time*.1));
+
+  //col *= smoothstep(0.,.01,);
+  float bt = pow(1.-fract(.2+time*bpm/60.), 4.);
+  float f = texture2D(midi, vec2(1./90.,1.), 0.).r;
+
+  float md1 = texture2D(midi, vec2(.69, .48), 0.).x;
+  float md2 = texture2D(midi, vec2(.69, .49), 0.).x;
+
+  vec2 uuv2 = uuv;
+
+  uuv = rot(time*.2+pow(length(uuv)*.5,5.)*53.) * uuv;
+  uuv = fract(uuv*2.)-.5;
+  vec2 idx = floor(uuv*2.);
+
+  float rad = mix(.4,mix(.1,.8,md1),bt);
+
+  rad += abs(idx.x)*.0;
+
+  float st = 24.*md2;
+  rad += pow(sin((atan(uuv.y, uuv.x)+.5*time)*st)*.5+.5, 10.)*bt*.3;
+  rad -= pow(sin((atan(uuv.y, uuv.x)+3.1415+.5*time)*st)*.5+.5, 1.)*bt*.1;
+
+  rad += pow(sin((atan(uuv.y, uuv.x)+1.*time)*st*10.)*.5+.5, 10.)*bt*.1;
+
+ float dd = length(uuv)-rad;
+
+  dd = max(dd, -(length(uuv)-rad*.5));
+
+  col *= mix(1., smoothstep(.0,.005, dd), md1*2.);
+
+  t0 = 5781.261;
+  t1 = t0 + 10.;
+  fac = mix(1.,-1.,sat(smoothstep(t0,t1,time)));
+  col = mix(col, vec3(col.r), smoothstep(.0,.005,uuv2.x+fac));
+
+  gl_FragColor = mix(texture2D(backbuffer, gl_FragCoord.xy/resolution), vec4(col, 1.0), .3);
+}