var colors = [c_red, c_orange, c_yellow, c_lime, c_aqua];

for (var r = 0; r < 5; r++) {
    for (var c = 0; c < 10; c++) {
        var b = instance_create_layer(
            c * 68 + 44, r * 26 + 60, "Instances", obj_brick);
        b.image_blend = colors[r];
        b.points = (5 - r) * 10;
    }
}