Create a damped oscillation.

spring.py

import math as m
import kMath as km
import matplotlib.pyplot as plt

A = .96 #initial height
ma = 5.0 #mass
k = 2.1 #spring constant
b = 0.09  #dampening
theta = 0 #phase angle
w = m.sqrt(k / ma)

l = []
for t in km.rangef(0, 100, 0.1):
    x = A * (m.e ** (-b * t)) * m.cos(w * t - theta)
    l.append(x)

plt.plot(l)
plt.show()