Step 2: Obtaining paper stripes: DIY easy
A4/Letter notebook paper, preferably yellow and without holes (like the one in the picture)
Tools for method A
Tools for method B
an exacto Knife
a cutting board
Take a peice of paper, and using scissors cut along the lines
Take a piece of paper, lay it on the cutting board, put the ruler against a line and use it as a guide for cutting with the exacto knife (see the second image). This method produces better stripes.