#include "colors.inc"    // The include files contain
#include "stones.inc"    // pre-defined scene elements

#include "textures.inc"    // pre-defined scene elements
#include "shapes.inc"
#include "glass.inc"
#include "metals.inc"
#include "woods.inc"

camera {
   location <0, 2, -3>
   look_at  <0, 0,  0>
}

sphere_sweep {
    linear_spline
    4,
    <0, 0, 0>, 1
    <0, 1, 0>, 1
    <1, 1, 0>, 1
    < 2, 1, 0>, 1
    pigment {
	checker color Red, color Blue
    }
}

plane { <0, 1, 0>, -1
    pigment {
	checker color Red, color Blue
    }
}


light_source { <2, 6, -4> color White}