Enter the curve you want to drive on…
Write it as a function of x, you can use the Numpy module if you want.
Make sure the function is CONTINUOUS on R+
I.E :
0 #(straight line)
np.cos(x)
np.sqrt(x)
np.cos(np.power(x, 7/10))
np.cos(x)*np.log(x+0.3)
1 - np.exp(np.sin(x/3))