I first bought a pack of multi-colored crayons and laid them all out in as close to rainbow order as I could get.
I then realized I wouldn't be able to use every one of the crayons given the space I had on my piece of glass, so I removed some.
I started laying out the crayons and hot gluing as I went along.
I glued the first four to establish the axes of the glass sheet. First quadrant done.
All finished gluing, ready to melt.
I set up my work space to try and use gravity to help the wax to melted downward.
That ended up not working so I just laid it down flat. Let the melting commence!
As I melted the wax, it was also remelting the hot glue. Every now and then a crayon would fly off and I would have to re-melt it back onto the glass, then melt elsewhere while it cooled.