Fibonacci Series of n number

Fibonacci_Sequence.asm

extern printf
extern scanf
section .data
 prompt: db "Enter no of terms in fibbonoci series",10,0
 fmts:  db "%d",0
 n : dd 0
 a: dd 0
 b: dd 1

section .text

 global main
 
 main:
  push ebp
  mov  ebp,esp

  push prompt
  call printf
  add esp,4

  push n
  push fmts
  call scanf
  add esp,8

  mov ecx,0
l1:
   cmp ecx,0
   je l2
   
  cmp ecx,1
  je l2

   mov eax,DWORD [a]
   mov ebx,DWORD [b]
   add eax,ebx 
   push ecx
   push ebx
   push eax
   push fmts
   call printf
   add esp,4
   
   pop eax
   pop ebx
   pop ecx
   
   mov DWORD [a],ebx
   mov DWORD [b],eax

   inc ecx
   cmp ecx,DWORD[n]
   jl l1
   jmp exit
l2:
   push ecx
   push fmts
   call printf
   add esp,4
   pop ecx
   inc ecx
    cmp ecx,DWORD[n]
    je exit 
    jmp l1
exit:

  mov eax,0
  mov esp,ebp
  pop ebp
  ret