Alien game code from book

[buran]

Sorry, my bad. It was just lines 8-12. line 7 was OK. Note also there is misspelled variable name on line 2

alien_0 = {'x_position': 0, 'y_poaition': 25, 'speed': 'medium'}
print('original x-position: ' + str(alien_0['x_position']))
 
#Move the alien to the right.
#Determine how far to move the alien based on its current speed.
if alien_0['speed'] =='slow':
    x_increment = 1
elif alien_0['speed'] == 'medium':
    x_increment = 2
else:
    # This must be a fast alien
    x_increment = 3
  
  
# The new position is the old position plus the increment.
alien_0['x_position'] = alien_0['x_position'] + x_increment
 
print('new x_position: ' +str(alien_0['x_position']))