varying vec3 normal;	
void main()
{
    float intensity;
    vec4 color;
    vec3 n = normalize(normal);

    intensity = dot(vec3(gl_LightSource[0].position),n);

    if (intensity > 0.95)
        color = vec4(1.0,0.5,0.5,1.0);
    else if (intensity > 0.5)
        color = vec4(0.6,0.3,0.3,1.0);
    else if (intensity > 0.25)
        color = vec4(0.4,0.2,0.2,1.0);
    else
        color = vec4(0.2,0.1,0.1,1.0);

    gl_FragColor = color;
} 