Like:
mov eax, 4
mov ebx, 1
mov ecx, message
mov edx, length
int 80h
mov eax, 4
mov ebx, 1
mov ecx, message2
mov edx, length2
int 80h
mov eax, 4
mov ebx, 1
mov ecx, message3
mov edx, length3
int 80h
and what about:
mov eax, 4
mov ebx, 1
mov ecx, message
mov edx, length
mov eax, 4
mov ebx, 1
mov ecx, message2
mov edx, length2
mov eax, 4
mov ebx, 1
mov ecx, message3
mov edx, length3
int 80h