Symmetry: Choose 1, 2, 3 or 4 to click a half-shape to complete. You have a donut pen to so you can see the red line as you draw the missing half-shape. Shapes 1, 2 and 3 can be completed with the arrow sprites moving one square at a time UP, DOWN, LEFT or RIGHT. Click the YELLOW check mark for PEN DOWN (to draw). Click the BLUE check mark for PEN UP (to move the pen without drawing a line). Shape 4 is not possible with the arrow sprites. The is programmed to connect coordinate points.
This project supports 'Draw Half Shapes' on pages 46 and 47 of the Scratch Maths Copybook