dosseg
.model small
.stack 100h
.data
.code

main proc

mov bx, 1
mov cx, 5

L1:
push cx
mov cx, bx

L2:
mov dx, '*'
mov ah, 2
int 21h

Loop L2

inc bx

pop cx
mov dx, 10
int 21h
mov dx, 13
int 21h

Loop L1

mov ah, 4ch
int 21h

main endp
end main