https://twitter.com/amagitakayosi/status/928463338597621761

particle.frag

/*{
    "pixelRatio": 0.5,
    "vertexCount": 1000,
    "vertexMode": "TRI_FAN",
    "PASSES": [{
        "TARGET": "renderBuffer",
        "vs": "./particle.vert",
    }, {
    }],
}*/
precision mediump float;
uniform float time;
uniform vec2 resolution;
uniform int	PASSINDEX;
uniform sampler2D renderBuffer;
uniform sampler2D backbuffer;
varying vec4 v_color;

mat2 mm2(in float a){float c = cos(a), s = sin(a);return mat2(c,s,-s,c);}
mat2 m2 = mat2(0.95534, 0.29552, -0.29552, 0.95534);
float tri(in float x){return clamp(abs(fract(x)-.5),0.01,0.49);}
vec2 tri2(in vec2 p){return vec2(tri(p.x)+tri(p.y),tri(p.y+tri(p.x)));}

float triNoise2d(in vec2 p, float spd)
{
  float z=1.8;
  float z2=2.5;
  float rz = 0.;
  p *= mm2(p.x*0.06);
  vec2 bp = p;
  for (float i=0.; i<5.; i++ )
  {
    vec2 dg = tri2(bp*1.85)*.75;
    dg *= mm2(time*spd);
    p -= dg/z2;

    bp *= 1.3;
    z2 *= .45;
    z *= .42;
    p *= 1.21 + (rz-1.0)*.02;

    rz += tri(p.x+tri(p.y))*z;
    p*= -m2;
  }
  return clamp(1./pow(rz*29., 1.3),0.,.55);
}

void main() {
    vec2 p = (gl_FragCoord.xy * 2. - resolution) / min(resolution.x, resolution.y);
    vec2 uv = gl_FragCoord.xy / resolution;
    // p = fract(abs(p));
    // float t = fract(time * .1) * .8 + .2;
    // float t = .7;
    // uv = abs(mod(uv - .5, t * 2.) - t);
    // float d = .001;
    // p = abs(p);

    // uv.y = (uv.y - .5) * .5 + .5;
    uv = (uv - .5) * 1.2 + .5;
    // uv = (uv - .25) * (uv - .255) + .5;

    gl_FragColor = vec4(1);
    gl_FragColor.r = texture2D(renderBuffer, uv).g * .9;
    gl_FragColor += texture2D(backbuffer, uv).r * .3;
    // gl_FragColor.b = .8;
    gl_FragColor.gb = 1.3 - triNoise2d(uv, time *.02)*.0 - texture2D(backbuffer, uv + .01).gr;
    gl_FragColor.g = .7 - texture2D(renderBuffer, uv + .02).r;// * .2;
    gl_FragColor /= .7 - triNoise2d(uv * 3.2, time *.01);
}

particle.vert

/*{
    "pixelRatio": 0.5,
    "vertexCount": 3000,
    "vertexMode": "TRIANGLES",
}*/
precision mediump float;
attribute float vertexId;
uniform float vertexCount;
uniform float time;
uniform vec2 resolution;
uniform vec2 mouse;
varying vec4 v_color;

mat2 mm2(in float a){float c = cos(a), s = sin(a);return mat2(c,s,-s,c);}
mat2 m2 = mat2(0.95534, 0.29552, -0.29552, 0.95534);
float tri(in float x){return clamp(abs(fract(x)-.5),0.01,0.49);}
vec2 tri2(in vec2 p){return vec2(tri(p.x)+tri(p.y),tri(p.y+tri(p.x)));}

float triNoise2d(in vec2 p, float spd)
{
  float z=1.8;
  float z2=2.5;
  float rz = 0.;
  p *= mm2(p.x*0.06);
  vec2 bp = p;
  for (float i=0.; i<5.; i++ )
  {
    vec2 dg = tri2(bp*1.85)*.75;
    dg *= mm2(time*spd);
    p -= dg/z2;

    bp *= 1.3;
    z2 *= .45;
    z *= .42;
    p *= 1.21 + (rz-1.0)*.02;

    rz += tri(p.x+tri(p.y))*z;
    p*= -m2;
  }
  return clamp(1./pow(rz*29., 1.3),0.,.55);
}


void main() {
  float t = time * .1;
  float i = vertexId * .2 + sin(vertexId) * 1.;

  vec3 pos = vec3(
    sin(t + vertexId + i * .1) * sin(t * 1.21 + i) *.8,
    cos(t + vertexId) * cos(t * 2.19 + i) *.6,
    0// cos(t + i) * sin(t + vertexId * .22)
  ) *.8;

  pos.x += triNoise2d(pos.xy, time *.001) * .5;
  pos.y += triNoise2d(pos.xy, time * .001) *.4;

  gl_Position = vec4(pos.x, pos.y * resolution.x / resolution.y, pos.z * .1, 1);
  gl_PointSize = .4 / max(abs(pos.z), .1);

  v_color = vec4(
    fract(pos.x + i),
    fract(pos.y + i),
    fract(pos.z + i),
    1
  );
}