pause/start
damping
spring stiffness
spring length
initial stretch
show energy
show clock
pan-zoom
time step
time rate
Diff Eq Solver
Eulers Method
Modified Euler
Runge-Kutta
Adaptive Step-Modified Euler
Adaptive Step-Runge-Kutta
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black
white with trails
black with trails
white with long trails
black with long trails
reset
spring stiffness
stretch
mass