- θ1 = π / 2
- θ2 = π
- circle1 mass = 10
- circle2 mass = 10
- gravity = 1
- friction = 0
- Change the weight of the circles
- Change the length of the arms
- Trace the old positions
- Reset the simulation
- Pause/Resum
- Full Screen Mode
- Change the frictopn
- Change the gravity
