.model small
 N equ 8
 char equ 0eh
.stack 100h
.data


.code


mov ax,3   ; text mode
int 10h


       mov ax, 0b800h; stores the address of the start of the screen in ax
       mov ds, ax    ; 
       mov bx, 0h    ; starts the address bx to the start of the screen
       mov al, char  ; al stores the char
       mov ah, 0h     
       mov cx, N

again: mov [bx], ax  ; sets up the first loop
       inc ah
       add bx, 2
       loop again    ; loops 8 times (for each line)
       sub ah, N
       add bx, 090h  
       add ah, 10h
       mov cx, N     ; sets the loop to 8 (N equals 8)
       cmp bx, 500h
       jnz again     ; while zeroflag differs from zero, jump to again
                                      
       mov bx, 12h   ; sets up the second loop
       mov ah, 008h  ; sets the backround color to a dark one the char color to a bright one 
       
again1:mov [bx], ax
       inc ah
       add bx, 2
       loop again1   ; loops 8 times (for each line)
       sub ah, N
       add bx, 090h
       add ah, 10h
       mov cx, N     ; sets the loop to 8 (N equals 8)
       cmp bx, 512h
       jnz again1    ; while zeroflag differs from zero, jump to again1
        
        
       mov bx, 5A0h  ; sets up the third loop(matrix) next to the first one          
       mov ah, 080h  ; sets the background color to a bright one and the char color to a dark one
       
again2:mov [bx], ax
       inc ah
       add bx, 2
       loop again2
       sub ah, N     ; loops 8 times (for each line)
       add bx, 090h
       add ah, 10h
       mov cx, N     ; sets the loop to 8 (N equals 8)
       cmp bx, 0AA0h
       jnz again2    ; while zeroflag differs from zero, jump to again2
        
       mov bx, 5B2h  ; sets up the third loop (matrix) under the second one
       mov ah, 088h  ; sets the background color to a dark one and the char color to a bright one
       
again3:mov [bx], ax
       inc ah
       add bx, 2
       loop again3   ; loops 8 times (for each line)
       sub ah, N
       add bx, 090h
       add ah, 10h
       mov cx, N     ; sets the loop to 8 (N equals 8)
       cmp bx, 0AB2h
       jnz again3    ; while zeroflag differs from zero, jump to again3
                 
          
mov ah, 4ch          ;returns control to the OS 
int 21h
end