scope (global) [
    [props]           : {color : float4}
    [pixel__ps_main]  : () -> float4
    [vertex__vs_main] : (pos : float4) -> float4
    scope (props) [
        [color]           : float4
    ]
    scope (vertex__vs_main) [
        [pos]             : float4
    ]
    scope (pixel__ps_main) []
]