-A big paper
1st step: Draw the template of a prism in a draft paper.
2nd step: Draw the template of the prism in the big cardstock.
3rd step: Draw the eyes in the prism.
4th step: Paint the eyes drawn with the colour of your eyes.
5th step: Cut the template.
6th step: Make the prism.
7th step: Put all the prisms in a same cardstock and hang them on the wall