for a in selection do
for t=0 to 100 do
animate on
at time t
a.height=(2/(distance a $sphere01)+1/(distance a $sphere02))

for a in selection do
for t=0 to 100 do
animate on
at time t
a.material.diffuse=color (3500/((distance a $sphere01)+(distance a $sphere02))-200) 0 0)

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