Fibonacci Assembly with Loop Stack Iteration - loops

Question

I am trying to write the fibonacci function in a loop in assembly language, but I cannot find the values I find in a certain order and add them to my stack.
The user will ask for the stack sequence range from us and the loop should be in the form of the equation For n> 1 F (n) = F (n-1) + F (n-2).
I could not understand what is my fault.
Example program should be like that; Enter the sequence number: 6, F(6) = 8
.data
str: .asciiz "Enter the sequence number: \n"
f: .word 0,1
.text
main:
la $s0 f #address of f
lw $s1 0($s0)
addi $a0 $zero 0 #int a0 = f[0]:0(s1)
lw $s2 4($s0)
addi $a1 $zero 1 #int a1 = f[1]:1(s2)
li $v0 4
la $a0 str #print string
syscall
li $v0 5
syscall
move $t0 $v0 #read integer t0=n
jal FIBO
addi $t1 $v0 0 #t1=v0=sum
add $t2 $a0 $a1 #t2=a0+a1=f[0]+f[1];
add $t3 $t2 $t1 #t3=t1+t2
li $v0 1 #print(t3)
addi $a0 $t3 0
li $v0 10 #exit program
syscall
FIBO:
addi $t1 $zero 1 #constant 1
addi $t2 $t0 0 #i:t2=n:t0
addi $t3 $zero 0 #f(i)=0:sum:t3;
#f(n)
#for (i=n, i>1, i--)
# f(i):sum = f(i-1)+f(i-2);
#return f(i)
FIBOLOOP:
slt $t4 $t1 $t2 #t1:1<t2:i
beq $t4 $zero EXIT_LOOP
addi $t4 $t2 -1
addi $t5 $t2 -2
add $t3 $t4 $t5
sub $sp $sp -24
sw $t3 0($sp) #BACKUP-STORING t3----1
sw $t3 4($sp)
sw $t3 8($sp)
sw $t3 12($sp)
sw $t3 16($sp)
sw $t3 20($sp)
subi $t2 $t2 1 # i--: we could write "addi t2 t2 -1" too
j FIBOLOOP
EXIT_LOOP:
add $sp $sp 24 #RESTORE t3---------2
lw $t3 0($sp)
lw $t3 4($sp)
lw $t3 8($sp)
lw $t3 12($sp)
lw $t3 16($sp)
lw $t3 20($sp)
addi $t4 $t3 0
move $v0 $t4
jr $ra