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

    return float4(0.0f);
}