putAxes    PROC
    push        ebx
    push        esi
    push        edi

    mov            ecx , ddheight                ; # of scanlines
    mov            edi , [ddsd.lpSurface]        ; pixel output            SETS UP INITIAL POINTER

    mov         xaxis, 0
    mov         yaxis, 0

    mov         ecx, xaxis


@@centre:
    mov     ebx, ddwidth            ; move full screen width in pixels to ebx
    mov     eax, xaxis                  ; move x into eax
    sub     ebx, eax                ; move across from left to right x number of pixels
    mov     ebx, 4                  ; move the size of a pixel into ebx
    mul     ebx                     ; mul size of pixel by number of pixels
    add     edi, eax                ; add the total starting from the start of the screen to make edi equal to the x coordinate
    mov     ebx, 512                ; mov y to ebx
    mov     eax, [ddsd.lPitch]      ; mov the width of a row (1 y unit) into eax
    mul     ebx                     ; mul number of rows by y coordinate
    add     edi, eax                ; add the product to edi

@@pixel:
    mov     eax, 4000000000         ; mov a colour into eax
    mov     [edi], eax              ; mov the colour into edi (which is the total of x pixels from the left + y rows down) and write the pixel

@@horizontal:

    inc     ecx                     ; pixel counter
    cmp     ecx, 1280
    je      @@vertical
    add     edi, 4
    jmp     @@pixel

@@vertical:
    mov     edi , [ddsd.lpSurface]        ; pixel output            SETS UP INITIAL POINTER
    mov     ebx, ddwidth            ; move full screen width in pixels to ebx
    mov     eax, 640                  ; move x into eax
    sub     ebx, eax                ; move across from left to right x number of pixels
    mov     ebx, 4                  ; move the size of a pixel into ebx
    mul     ebx                     ; mul size of pixel by number of pixels
    add     edi, eax
    mov     ecx, 0                  ; mov y start into ecx (row counter)
    mov     eax, [ddsd.lPitch]      ; mov the width of a row (1 y unit) into eax
    mul     ebx                     ; mul number of rows by y coordinate
    add     edi, eax                ; add the product to edi

@@drawvert:
    mov     eax, 4000000000         ; mov a colour into eax
    mov     [edi], eax              ; mov the colour into edi (which is the total of x pixels from the left + y rows down) and write the pixel
    inc     ecx
    cmp     ecx, 1024
    je      @@end
    add     edi, [ddsd.lPitch]
    jmp     @@drawvert

@@end:


    pop         edi
    pop         esi
    pop         ebx


    ret
putAxes ENDP