im making a space invaders project to school and im trying to check if the aliens got to the button of the screen. i used the int 10h d (it takes the color of a pixel on the screen) on my code and it stuck every thing, i tried to understand what happened and came to the conclusion that the line “mov ah,0Dh” along with the “int 10h” line makes it stuck. does anybody has any idea what i can do in order to make it work?

im making a space invaders project to school and im trying to check if the aliens got to the button of the screen. i used the int 10h d (it takes the color of a pixel on the screen) on my code and it stuck every thing, i tried to understand what happened and came to the conclusion that the line “mov ah,0Dh” along with the “int 10h” line makes it stuck. does anybody has any idea what i can do in order to make it work?