float4 vs_main(float3 pos : POSITION) : SV_POSITION
{
    if (pos.x > 100)
    {
        return float4(pos, 1.0f);
    }
    else if (pos.x > 50)
    {
        return float4(pos, 1.0f);
    }
    else 
    {
        return float4(1.0f, 1.0f, 1.0f, 1.0f);
    }
    return float4(0.0f, 0.0f, 0.0f, 0.0f);
}

