I have a hard time following the origami. After folding 1-2-3-4, I have a retangular cube. How am I supposed to accomplish fold #5? Sorry for being dense, not a

I have a hard time following the origami. After folding 1-2-3-4, I have a retangular cube. How am I supposed to accomplish fold #5? Sorry for being dense, not an origami guy. Anyone got a pic how how it's supposed to look like?