Understanding the time value of money

In finance, we know that $100 received today is more valuable than $100 received one year later. If we use size to represent the difference, we could have the following Python program to represent the same concept:

from matplotlib.pyplot import *
fig1 = figure(facecolor='white')
ax1 = axes(frameon=False)
ax1.set_frame_on(False)
ax1.get_xaxis().tick_bottom() 
ax1.axes.get_yaxis().set_visible(False) 
x=range(0,11,2)
x1=range(len(x),0,-1)
y = [0]*len(x);
annotate("Today's value of $100 received today",xy=(0,0),xytext=(2,0.001),arrowprops=dict(facecolor='black',shrink=0.02))
annotate("Today's value of $100 received in 2 years",xy=(2,0.00005),xytext=(3.5,0.0008),arrowprops=dict(facecolor='black',shrink=0.02))
annotate("received in 6 years",xy=(4,0.00005),xytext=(5.3,0.0006),arrowprops=dict(facecolor='black',shrink=0.02))
annotate("received in 10 years",xy=(10,-0.00005...