precision mediump float;
uniform vec2 resolution;
uniform float time;
void main() {
  vec2 uv = (gl_FragCoord.xy - 0.5 * resolution.xy) / min(resolution.x, resolution.y);
  vec2 a = uv + 0.18 * vec2(sin(time * 0.5), cos(time * 0.4));
  vec2 b = uv - 0.16 * vec2(cos(time * 0.35), sin(time * 0.55));
  float r1 = sin(length(a) * 72.0 - time * 3.0);
  float r2 = sin(length(b) * 69.0 + time * 2.4);
  float m = smoothstep(0.0, 0.08, abs(r1 - r2));
  vec3 color = mix(vec3(0.98,0.2,0.55), vec3(0.1,0.9,1.0), m);
  color *= 0.55 + 0.45 * sin(length(uv) * 8.0 - time);
  gl_FragColor = vec4(color, 1.0);
}

precision mediump float;
uniform vec2 resolution;
uniform float time;
float hash(vec2 p){return fract(sin(dot(p,vec2(41.0,289.0)))*45758.5453);} 
float noise(vec2 p){vec2 i=floor(p),f=fract(p);f=f*f*(3.0-2.0*f);return mix(mix(hash(i),hash(i+vec2(1,0)),f.x),mix(hash(i+vec2(0,1)),hash(i+1.0),f.x),f.y);} 
float fbm(vec2 p){float v=0.0,a=0.55;for(int i=0;i<5;i++){v+=a*noise(p);p*=2.05;a*=0.52;}return v;}
void main(){
 vec2 uv=(gl_FragCoord.xy-0.5*resolution.xy)/min(resolution.x,resolution.y);
 float n=fbm(uv*3.4+vec2(time*0.035,-time*0.025));
 float v=sin((length(uv)+n*0.42)*48.0-time*1.2);
 float cells=smoothstep(0.18,0.82,v)*smoothstep(1.05,0.35,n);
 vec3 a=vec3(0.02,0.03,0.055), b=vec3(0.96,0.76,0.28), c=vec3(0.2,0.75,0.72);
 gl_FragColor=vec4(mix(a,mix(b,c,n),cells),1.0);
}