Reference of finished painting
Step one: first draw a rectangle.
Step 2: Then draw two arcs below the rectangle, and then draw a small rectangle below.
Step 3: Draw a larger oval on top.
Step 4: Then draw two smaller ovals.
Step 5: Then draw some large and small cactus on top.
Step 6: You also need to use small dots to draw the thorns of the cactus. You can add more dots.
Step 7: Finally, apply a nice color and the cactus is ready.