I know that it's probably something really easy, but here's the code:

Code:
```ClrHome 1->A 1->B 0->K For(B,1,10)    Output(B,1,"OOOOOOOOOOOOOOOOOOOOOOOOOO") End Output(B,A,"X") Repeat 1=0    getKey->K    If not(K=0)    Then       If K=25 and not(B=1) //up       Then          Output(B,A,"O")          B+1->B          Output(B,A,"X")       End       If K=26 and not(A=26) //left       Then          Output(B,A,"O")          A+1->A          Output(B,A,"X")       End       If K=24 and not(A=1) //right       Then          Output(B,A,"O")          A-1->A          Output(B,A,"X")       End       If K=34 and not(B=10) //down       Then          Output(B,A,"O")          B-1->B          Output(B,A,"X")       End       If K=23 //del       Then          ClrHome          Stop       End    End End```

I am getting a domain error on line 8 (Output(B,A,"X")), but I don't understand what could possibly be wrong. This is supposed to put an X on the screen with everything else Os and allow you to move it around with the arrows. I would really appreciate some help on this!
At the end of the first For( loop, B has a value of 11, since the value of B needs to exceed 10 to quit the loop. Because the screen only has 10 rows to display text, a domain error occurs when trying to print on an 11th row.

Hopes this helps!
Also, remember to use the [code] brackets when posting code. It makes it a lot easier for us (and you) to figure out what is wrong.

P.S. Welcome to Cemetech. Hope you enjoy it here.

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