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Draw spirals with the Finch!
Free Teacher Materials
- Large sheets of paper
ADVANCED: Going Further
Required lesson: Variables
When the Finch’s two motors move at the same speed, it moves in a straight line. When they move at different speeds, it moves in a circle. To make the Finch draw a spiral, you want to gradually change the speed of the right wheel while the left wheel stays at the same speed.
Declare a variable called speed. Use it in a loop with the Finch Wheels block to gradually increase the speed of the right wheel from -25% to 25% while the speed of the left wheel is constant at 50%. The Finch should move for 0.2 seconds at each value for the right wheel. Remember to stop the Finch at the end of the program!