Can't get a ball to bounce off four sides

[GabeC99]

so basically I need a ball to bounce off four walls in my program and i can make it bounce off one but I cant get it to do it for the other 3.
If i try to edit a new code to make it bounce off the second wall it just edits my code for the first wall bounce. Please help!

code:

setscreen ("graphics: 200, 500") var centerX, centerY : int centerX := 30 centerY := 100 loop     drawoval (centerX, centerY, 25, 25, 1)     drawfill (centerX, centerY, 7, 1)     delay (10)     cls     if centerX < 200 - 25 then         centerX := centerX + 1         centerY := centerY + 1     end if     if centerX = 200 - 25 then         loop             centerX := centerX - 1             centerY := centerY + 1             drawoval (centerX, centerY, 25, 25, 1)             drawfill (centerX, centerY, 7, 1)             delay (10)             cls         end loop     end if     if centerX = 30 - 400 then     centerX := centerX + 1     centerY := centerY + 1     drawoval (centerX, centerY, 25, 25, 1)             drawfill (centerX, centerY, 7, 1)                         delay (50)         end if    cls end loop

[Tony]

From your code

code:

if centerX = 200 - 25 then         loop             centerX := centerX - 1             centerY := centerY + 1             drawoval (centerX, centerY, 25, 25, 1)             drawfill (centerX, centerY, 7, 1)             delay (10)             cls         end loop     end if

when does this loop exit?

[GabeC99]

Tony @ Thu Jan 15, 2015 2:04 pm wrote:

From your code

code:

if centerX = 200 - 25 then         loop             centerX := centerX - 1             centerY := centerY + 1             drawoval (centerX, centerY, 25, 25, 1)             drawfill (centerX, centerY, 7, 1)             delay (10)             cls         end loop     end if

when does this loop exit?

It doesnt

[Insectoid]

That's right! So when does the rest of the code execute?