void main ()
{
  gl_FragData[0] = vec4(0.0, 0.0, 0.0, 0.0);
  gl_FragData[1] = vec4(0.1, 0.1, 0.1, 0.1);
  gl_FragData[2] = vec4(0.2, 0.2, 0.2, 0.2);
  gl_FragData[3] = vec4(0.3, 0.3, 0.3, 0.3);
}


// inputs: 0, stats: 4 alu 0 tex 0 flow