Take different colors of  6 paper and 1 cardboard
Take 21 cm square paper
Now take another paper and measure the size of one part
Put the another color of paper to looks good
Following same process make 6 parts for 1 pen holder
Now glue the parts one by one
Attach the parts by matching colors
Now take a cardboard and draw the bottom line
To cover the cardboard take a color paper
Fold all side
Glue the cardboard with the paper
Now attach the cardboard with the bottom line of pen/pencil holder
You may use this as your desk organizer
