#
# Print a parabolic shape 
#
# The x-axis goes down the screen
# The y-axis goes right
#

# step thru values of x
#
for x in range(0,30):

   # compute the y coordinate of parabola
   #   y = -1/2 x^2 + 60

   y = -(0.5*x-5)**2 + 60    

   # make sure we actually need to print something
   if y >= 0:

      # number of spaces to print, round up
      n = int(y + 0.5) 

      # print spaces up to y
      for j in range(0,n) :
         print(" ", end="")

      # print the marker for the parabola
      print("o")

   else:  # if y < 0, just print a blank line

      print("")