request for printing patterns with for loops tutorial

[bplus]

OK @fistfullofnails to print a true square on default screen 0

Here is red square printed with background color 4 into middle of screen:

Code: (Select All)

'  a character cell is 8 pixels wide X 16 pixels high
rowStart = 11: rowEnd = 15 ' 5 vertical rows  5 * 16 = 80 pixels
colStart = 36: colEnd = 45 ' 10 columns 10 * 8 = 80 pixels

' 80 pixels X 80- pixels = true square in screen 0

' pick a color 0 to 7 not 0 = default black background say 4
backcolor = 4 ' try different colors here 4 is red

'  color forecolor,  backcolor   '<<< command to control color

Color , backcolor '  set color to 4, now anywhere we print backcolor is red = 4

' color our square on default black background
For row = rowStart To rowEnd
    For col = colStart To colEnd
        Locate row, col: Print " "; ' print a space at each location of the square
    Next
Next
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