Start with an 8.5 x 11in piece of paper or any paper with a side length ratio of 1:.77. Start with the colored side facing down and fold it in half. Then unfold
Fold the paper in half the other way and don't unfold
Make sure the open side is at the bottom. Fold the top sides down like so
Fold the bottom flap up and repeat on the other side
Open the model up
Flatten
Fold the bottom up and repeat on the other side
Open the model up
Flatten
Pull the two top things out
Flatten
Done!