10 REM PC-BASIC test 
20 REM LINE syntax
30 OPEN "OUTPUT.TXT" FOR OUTPUT AS 1
40 ON ERROR GOTO 1000
50 SCREEN 1
150 LINE - (10,10)
160 LINE - STEP (10,10)
170 LINE STEP - STEP (10,10)
180 LINE (10,10) -
999 END
1000 PRINT#1, ERR, ERL
1010 RESUME NEXT
