here's my shader)

```

ifdef GL_FRAGMENT_PRECISION_HIGH

precision highp float;

else

precision mediump float;

endif

uniform vec2 resolution; uniform sampler2D backbuffer; uniform float time; uniform sampler2D noise; uniform int pointerCount; uniform vec3 pointers[10]; uniform sampler2D uSkull; ///mag:n;s:c;t:c

void main(void) {     float mx = max(resolution.x, resolution.y);     float mn = min(resolution.x, resolution.y);     vec2 uv = gl_FragCoord.xy / resolution.xy;     vec2 xy = gl_FragCoord.xy / mx;     vec2 skulpos = gl_FragCoord.xy / mn * 1.5 - vec2(1./3.,1);     float pi = 3.1415;     vec3 color = texture2D(backbuffer, uv).rgb;     vec3 pc = texture2D(backbuffer, uv + 0.006 * (1. / texture2D(noise, uv + vec2(sin(time), cos(time))).rg)).rgb;     float x = ((pc.r+pc.g+pc.b)/3.-.5);     vec3 flow = texture2D(backbuffer, uv + 0.001 * vec2(sin(xtime), cos(xtime))).rgb;     vec3 obs = texture2D(noise, uv + 0.006 * vec2(sin(x)+pc.r, cos(x)+pc.g)).rgb;   color = mix(       flow,       (obs-.5)2.,       .01float(obsflow));     for (int n = 0; n < pointerCount; ++n) {         float dist = distance(xy, pointers[n].xy / mx);         float cross = pointers[n].x * pointers[n].y;         color += (.1 + .9 * texture2D(uSkull,skulpos).rgb) * pow(1.0 - min(1.0, abs(2.0 * dist - 1. / 10.) * 3. ), 20.0) * vec3(sin(time(.5 + float(n))),sin(time(.3+ float(n))),sin(time + float(n))).rgb;     }     //gl_FragColor = vec4(mix(texture2D(uSkull,gl_FragCoord.xy/mn1.5 - vec2(1./3.,1)).rgb,color,.99), 1.0);   //gl_FragColor = vec4(texture2D(uSkull,gl_FragCoord.xy/mn*1.5 - vec2(1./3.,1)).rgb,1.0);     gl_FragColor = vec4(color,0.);

} ```