where colors = [ vec4 1 0 0 1 , vec4 0.5 0.5 0 1 , vec4 1 1 0 1 , vec4 0 1 0 1 , vec4 0 1 1 1 , vec4 0 0.5 1 1 , vec4 0.5 0 0.5 1 ] ++ colors