First, everything you need:
I used printer ink for those,but I suppose you can do it with all sorts of colored liquids, including water with some watercolors.I have four syringes,each one for a color, so it makes it easier to apply and use the ink.
First, you have to make the flashlight to stay on its own.Some of them can stand, others can’t,like mine. So i used my parakeet’s food to make it stay [you can use anything that works]
Afterwards, you put the glass thing on top [it doesn't have to be a plate, you can take the glass out of a frame,but I don't have such thing anymore] and after you turn on the light it should look more or less like this:
After this, you use the syringe[I started with the blue one] to put some ink on the glass,then you keep using it to make the model. You can continue with a second or third color,if you want. It should look like this:
And that’s pretty much it. You can use other things,like colored paper or whatever you want as a background:
Yellow background [not a very happy choice,given the colors i used on glass].
That’s it. I would be honored if you’d show me your results.