Adjust marker sizes and colors in Scatter Plot:

You can specify the marker size with the parameter s and the marker color with c in the plt.scatter() function.

import matplotlib.pyplot as plt
import matplotlib.colors

# Prepare a list of integers
val = [2, 3, 6, 9, 14]

# Prepare a list of sizes that increases with values in val
sizevalues = [i**2*50+50 for i in val]

# Prepare a list of colors
plotcolor = ['red','orange','yellow','green','blue']

# Draw a scatter plot of val points with sizes in sizevalues and
# colors in plotcolor
plt.scatter(val, val, s=sizevalues, c=plotcolor)

# Set axis limits to show the markers completely
plt.xlim(0, 20)
plt.ylim(0, 20)

plt.show()