t = 0 (slider from 0 to 12, step 0.01)
av = 1.2 (slider from 0 to 9, step 0.01)
A: (av * t, 5.0)
bv = 0.5 (slider from -5 to 5, step 0.1)
bx0 = 6 (slider from 0 to 12, step 0.1)
B: (bx0 + bv * t, 4.0)