{
   "MaxCount": 800,
   "Duration": 4,
   "Rate": 120,
   "Drawable": {
      "Type": "SkCircleDrawable",
      "Radius": 2
   },
   "Code": [
      "// float rand; Every read returns a random float [0 .. 1)",
      "layout(ctype=float) in uniform float dt;",
      "layout(ctype=float) in uniform float effectAge;",
      "",
      "struct Particle {",
      "  float  age;",
      "  float  lifetime;",
      "  float2 pos;",
      "  float2 dir;",
      "  float  scale;",
      "  float2 vel;",
      "  float  spin;",
      "  float4 color;",
      "  float  frame;",
      "};",
      "",
      "void spawn(inout Particle p) {",
      "  p.lifetime = 2 + rand;",
      "  float a = radians(effectAge * 1080);",
      "  float s = 50 + rand * 10;",
      "  p.vel.x = cos(a) * s;",
      "  p.vel.y = sin(a) * s;",
      "}",
      "",
      "void update(inout Particle p) {",
      "  p.scale = 0.5 + 1.5 * p.age;",
      "  float3 a0 = float3(0.098, 0.141, 0.784);",
      "  float3 a1 = float3(0.525, 0.886, 0.980);",
      "  float3 b0 = float3(0.376, 0.121, 0.705);",
      "  float3 b1 = float3(0.933, 0.227, 0.953);",
      "  p.color.rgb = mix(mix(a0, a1, p.age), mix(b0, b1, p.age), rand);",
      "}",
      ""
   ],
   "Bindings": []
}