1. Draw button sprite
2. Add broadcast to button
3. On pencil sprite, call appropriate procedure when message received
4. Duplicate and repeat for other buttons
Did you know that Scratch uses x and y axes to define a coordinate plane? How does this system enable engineers to construct scaled models?
Math Standards:
CCSS.MATH.CONTENT.HSG.MG.A.3
CCSS.MATH.CONTENT.5.G.A.1