- white drawing sheet A4 size
- coloured paper for background
Then draw five wavy lines from top to bottom.
Choose three colours and colour the triangles: one colour for the bottom triangles of the squares, another colour for the left triangles and a third colour for the triangles on the right. The upper triangle in a square is always white. This is the foamy head of the wave!
Cut a slightly wavy line on the left, right and bottom of the drawing. Cut a strip of the upper triangles away. Paste the work 'wavy' on a coloured sheet.