Well first ya take your boy who has a spaghetti stain and make sure everything’s in one layer
Duplicate the layer and then add two new layers above what you just duplicated
Set the new blank layers to “Screen” and turn on “Clipping”
Color the blank layers in with green and pink at the highest saturation
Now combine the colors to their respective layers
Set the top layer to “Multiply” and everything should look normal…
Until you move one layer slightly :0c
And you can do this with pretty much any color as long as they’re on opposite sides of the color wheel! This is also the same method I use to do the Darkiplier 3D effect