PS3 Wave Shader in GLSL

#ifdef GL_ES
  precision highp float;
#endif

uniform vec2 frame;
uniform vec2 resolution;
uniform vec2 offset;

void main() {
  vec2 position = gl_FragCoord.xy / resolution.xy;
  if (gl_FragCoord.y < float(offset.y) + (resolution.y/10.0)*4.0 + sin(radians(mod((gl_FragCoord.x/10.0)+frame.x,360.0)))*30.0)
    gl_FragColor = vec4(1, 1, 1, 1);
  else if (gl_FragCoord.y < float(offset.y) + (resolution.y/2.0) + sin(radians(mod((gl_FragCoord.x/20.0)+frame.x,360.0)))*30.0)
    gl_FragColor = vec4(0.6235294117647059, 0, 0.7803921568627451, 1);
  else if (gl_FragCoord.y < float(offset.y) + (resolution.y/10.0)*6.0 + sin(radians(mod((gl_FragCoord.x/10.0)+frame.x,360.0)))*30.0)
    gl_FragColor = vec4(0.4862745098039216, 0.0745098039215686, 0.6588235294117647, 1);
  else {
    gl_FragColor = vec4(0.1019607843137255, 0.0941176470588235, 0.1529411764705882, 1);
  }
}