gistfile1.txt

        <script type="x-shader/x-fragment" id="sky-fragment">
            #ifdef GL_ES
            precision mediump float;
            #endif
            varying vec2 vUv;
            uniform float time;
            //3.141592654
            float hash( float n )
            {
                return fract(sin(n)*43758.5453);
            }

            float noise( vec3 x )
            {
                // The noise function returns a value in the range -1.0f -> 1.0f

                vec3 p = floor(x);
                vec3 f = fract(x);

                f       = f*f*(3.0-2.0*f);
                float n = p.x + p.y*57.0 + 113.0*p.z;

                return mix(mix(mix( hash(n+0.0), hash(n+1.0),f.x),
                               mix( hash(n+57.0), hash(n+58.0),f.x),f.y),
                           mix(mix( hash(n+113.0), hash(n+114.0),f.x),
                               mix( hash(n+170.0), hash(n+171.0),f.x),f.y),f.z);
            }
            void main( void ) {
                float depth = 1.0-(abs(0.5 - vUv.y) * 4.0);
                float a = noise(vec3(vUv.x, vUv.y, 1.0));
                float a2 = noise(vec3(vUv.x * 10.0, vUv.y * 10.0, 1.0));
                float a3 = noise(vec3(vUv.x * 40.0, vUv.y * 40.0, 1.0));
                float a4 = noise(vec3(vUv.x * 760.0, vUv.y * 260.0, 1.0));
                float x = vUv.x + cos(a + a2 / 10.0 + a3 / 40.0 + a4 / 160.0);
                float y = vUv.y + sin(a + a2 / 10.0 + a3 / 40.0 + a4 / 160.0);
                float intense = abs(mod(cos(x * 3.141592654 * 10.0), 0.4)-0.2);
                intense += abs(mod(cos(x * 3.141592654 * 10.0), 0.4)-0.2);
                intense += abs(mod(cos(x / 4.0 * 3.141592654 * 10.0), 0.4)-0.2);
                intense += abs(mod(cos(x / 16.0 * 3.141592654 * 10.0), 0.4)-0.2);
                intense += abs(mod(sin(y * 3.141592654 * 10.0)*10.0, 0.4) - 0.2);
                intense += abs(mod(sin(y / 4.0 * 3.141592654 * 10.0)*10.0, 0.4) - 0.2);
                intense += abs(mod(sin(y / 16.0 * 3.141592654 * 10.0)*10.0, 0.4) - 0.2);
                intense += abs(mod(sin(y / 64.0 * 3.141592654 * 10.0)*10.0, 0.4) - 0.2);
                intense = pow(intense, 2.0);
                //float waver = 0.06 * -vUv.y *  sin(vUv.x * 3.141592654 * 12.0 );
                float blue = 1.0*intense;
                float red = 0.66*intense;
                float green = 0.11;

                vec4 color = vec4(
                    (intense * ((red * depth))),
                    depth* intense * green,
                    (intense * 1.5 * ((blue * depth))),
                    1.0
                );

                gl_FragColor = color;
            }
        </script>