$ python tracker.py 

  dpi=122.00000183225619, distance=449.7199128346442 , cursor: x=1822,y=1504, speed=0.0
  dpi=122.00000183225619, distance=448.3056992722711 , cursor: x=1821,y=1504, speed=9.902572735192665
  dpi=122.00000183225619, distance=448.3056992722711 , cursor: x=1821,y=1504, speed=0.0
  dpi=122.00000183225619, distance=446.89148570989806 , cursor: x=1820,y=1504, speed=9.888424968703069
  dpi=122.00000183225619, distance=446.89148570989806 , cursor: x=1820,y=1504, speed=0.0
  dpi=122.00000183225619, distance=446.89148570989806 , cursor: x=1820,y=1504, speed=0.0
  dpi=122.00000183225619, distance=441.23463146040564 , cursor: x=1811,y=1499, speed=102.77556282930243
  dpi=122.00000183225619, distance=298.3990616607231 , cursor: x=1694,y=1483, speed=1172.7735065693703
  dpi=122.00000183225619, distance=188.09040379562165 , cursor: x=1658,y=1525, speed=549.4462925165078
  dpi=122.00000183225619, distance=137.17871555019022 , cursor: x=1659,y=1562, speed=368.0670988839888
  dpi=122.00000183225619, distance=140.0071426749364 , cursor: x=1672,y=1573, speed=168.37634304042737
  dpi=122.00000183225619, distance=185.26197667087544 , cursor: x=1715,y=1584, speed=441.0626695277481
  dpi=122.00000183225619, distance=217.78888860545663 , cursor: x=1745,y=1591, speed=306.03252205941754
  dpi=122.00000183225619, distance=248.90158697766472 , cursor: x=1762,y=1586, speed=176.93148785162364