Climb the stairs : 3-D drawing

Today I bring you a drawing in third dimension, simple to make and that produces a great optical effect of a staircase attached to the wall.

Materials I used:

Letter size white bond paper.

Graphite pencil.

Ruler.

Fine gray marker.

Medium black marker.

Pencil sharpener and eraser.

Camera of my Samsung A10 cell phone

Step by step

By folding the sheet in half, observe the effects from different angles.