phase = 0.8 (slider from 0 to 6.283185307179586, step 0.1)
dw = 0.6 (slider from 0 to 1, step 0.01)
w = 5 (slider from 1 to 10, step 0.1)
A = 2.5 (slider from 0 to 5, step 0.1)
f(x) = A * sin(w * x)
g(x) = A * sin((w + dw) * x + phase)
h(x) = f(x) + g(x)