JPDye

animations {
    window-open {
        duration-ms 500
        curve "linear"

        custom-shader r"
            vec4 open_color(vec3 coords_geo, vec3 size_geo) {
                if (coords_geo.x < 0.0 || coords_geo.x > 1.0 ||
                    coords_geo.y < 0.0 || coords_geo.y > 1.0)
                    return vec4(0.0);