Last Step

The new statements ask the user to enter a value, and then read the value into a variable called GUESS.

'
LET NUMBER = INT( 30000*RND )    ' pick a random number 0 to 29,999
'
SCREEN 12
FOR DOT = 1 to  NUMBER 
  LET X = INT( 640*RND )    ' pick a random column 0 to 639
  LET Y = INT( 480*RND )    ' pick a random row    0 to 479 
  PSET( X, Y)               ' draw the random point
NEXT DOT
'
PRINT "How many spots are there"
READ  GUESS
'
END

The last step is to calculate the user's error and to print the result. The ERROR can be calculated by subtracting the number in GUESS from the NUMBER of spots. After it is calculated, NUMBER and ERROR should be printed out.