# - red: y
-1 -> InitialPosition -> -y0 # -initial position of the mass
-1 -> InitialSpeed -> y0s’ # y’ is scaled to be within -1..+1
-+1, y0s’, y0s’ -> Summer.1 -> y0’
++1, y0s’, y0s’ -> Summer -> y0’
-y’’, IC:y0’ -> INTEGRATOR.1 -> -y’
--y’,IC:-y0 -> INTEGRATOR.2 -> y
+y’’, IC:y0’ -> INTEGRATOR -> -y’
+-y’,IC:-y0 -> INTEGRATOR -> y
y -> SpringForce -> S*y # springforce times displacement
--y’ -> INVERTER.1 -> y’
+-y’ -> INVERTER -> y’
y’ -> Damping -> D*y’ # damping times speed
-10:S*y, 10:D*y’ -> SUMMER.2 -> -(Dy’+Sy)
+10:S*y, 10:D*y’ -> SUMMER -> -(Dy’+Sy)
-(Dy’+Sy) -> Mass -> -1/m*(Dy’+Sy)=y’’
OPERATION DIVISION