How do I stop a bullet

This is my code

keyboard on right arrow pressed: ball set bullet enabled

ball X = 280: ball set bulllet disabled

ball does not stop.

why

Because your ball never hit exactly x=280.

If you have a speed of 240 in your bullet-behavior, the ball will travel 4 pixel each tick, if you set the ball in the beginning to x=1 every tick it will travel 4 pixel, so after the first tick it is x=5 then x= 9 and at least x=277 and x=281

so it will never trigger x=280.

Even if you set it to x=0 a little slowdown could alter delta time and you will miss x=280 again.

Better is to use x>280.

try using the bullet parameter sprite.bullet.distancetraveled >=(greater or equal) to 280 = disable bullet

this way when ur bullet will travel 280 pixels in any direction you point it at will disable itself.