flying dot

[Dio]

I made this a while ago and I was wondering if it could be used in games somehow, of course with modifications for each different game.

[syntax="qbasic"]SCREEN 13
'--------------------------|
'press "b" during to change|
'--------------------------|
x = 160: y = 180
B$ = "2"
DO
LINE (-1, -1)-(1, 1), 1, B
press$ = INKEY$

stimer = TIMER
DO: LOOP UNTIL TIMER > stimer + .001
ox = x: oy = y
IF press$ = "b" THEN
SELECT CASE B$
CASE "0"
B$ = "2"
CASE "1"
B$ = "0"
CASE "2"
B$ = "1"
END SELECT
END IF


qq = 15
IF press$ = CHR$(0) + "H" THEN yu = qq
IF press$ = CHR$(0) + "K" THEN xl = qq
IF press$ = CHR$(0) + "M" THEN xr = qq
IF press$ = CHR$(0) + "P" THEN yd = qq

'*********YU**************
yu = yu - 1
IF yu = -1 THEN yu = 0
y = y - yu
IF y < 0 OR y = 0 THEN y = 0
IF y > 199 THEN y = 199
'**************************


'*********YD**************
yd = yd - 1
IF yd = -1 THEN yd = 0
y = y + yd
IF y < 0 OR y = 0 THEN y = 0
IF y > 199 THEN y = 199
'**************************


'*********XR**************
xr = xr - 1
IF xr = -1 THEN xr = 0
x = x + xr
IF x < 0 OR x = 0 THEN x = 0
IF x > 319 THEN x = 319
'**************************


'*********XL**************
xl = xl - 1
IF xl = -1 THEN xl = 0
x = x - xl
IF x < 0 OR x = 0 THEN x = 0
IF x > 319 THEN x = 319
'**************************



IF ox <> x OR oy <> y THEN
IF B$ = "0" THEN
LINE (x, y)-(ox, oy), 1, B
PSET (x, y), 4: PSET (ox, oy), 4
END IF
PSET (x, y), 4
IF B$ = "2" THEN PSET (ox, oy), 0
END IF
IF x = 0 AND y = 0 THEN END
LOOP UNTIL press$ = CHR$(27)[/syntax]