grazer

vec2 center = vec2(0.8,0);
float blue = 0.3; 

void main() {
    vec2 z, c;
    float scale = 20.0/iGlobalTime; // zoom in
    vec2 uv = gl_FragCoord.xy / iResolution.xy;

    c.x = 1.3333 * (uv.x - 0.5) * scale - center.x;
    c.y = (uv.y - 0.5) * scale - center.y;

grazer

void main(void) {
    // the center of the texture
    vec2 center = vec2(iResolution.x/2.0,iResolution.y/2.0); 
	
    // current pixel location
    vec2 loc = gl_FragCoord.xy;
	
    // how far we are from the center
    float radius=length(loc-center);
	

grazer

void main(void) {
  gl_FragColor = vec4(0,1.0,0,1.0);
}

grazer

class TokenBucket(msgPerSecond:Long, bucketSize:Long) {

    var prev = 0L
    var tokens = bucketSize

    def limit(func: => Any): Any = {
        val current = System.currentTimeMillis
        val delta = current-prev
        prev = current
        tokens += delta/1000.0 * msgPerSecond