plane
{
z, 0.7
texture
{
pigment
{
gradient x
color_map
{
[1/3 rgb 0]
[1/3 rgb <1, 0.9, 0>]
[2/3 rgb <1, 0.9, 0>]
[2/3 rgb <1, 0, 0>]
}
translate -x/2
}
finish { ambient 1 diffuse 0 }
}
}