How can I make this program better

I'm writing a program to control the systems in my warehouse. I guess my code is sloppy, is there any way that I can make it more organized ? like using functions and such ? help or examples would be great!

force = "1"
power = "2"
gate = "3"
four = "4"
five = "5"
resource = "4"
while true do
  term.clear()
  term.setCursorPos(1,1)
  print("--------------------------------------------------")
  print("WAREHOUSE CONTROL SYSTEM")
  print("--------------------------------------------------")
  print("Choose an option")
  print("")
  print("[1] Force Shield")
  print("[2] Power")
  print("[3] Gate Systems")
  print("[4] Resource Management")
  print("")
  print("--------------------------------------------------")
  print("--------------------------------------------------")
  term.setCursorPos(1,13)
  input = read()
   if input == force then
    term.clear()
    term.setCursorPos(1,1)
    print("--------------------------------------------------")
    print("FORCEFIELD SYSTEM")
    print("--------------------------------------------------")
    print("")
    print("[1] Turn On EU Injection")
    print("[2] Turn OFF EU injection")
    print("[3] Turn On FORCESHIELD")
    print("[4] Turn OFF FORCESHIELD")
    print("[5] Main Menu")
    print("")
    print("--------------------------------------------------")
    print("--------------------------------------------------")
    term.setCursorPos(1,13)
    input = read()
	 if input == force then
	  ---- code here
	  elseif input == power then
	  ----- code here
	  elseif input == gate then
	  ----- code here
	  elseif input == four then
	  ----- code here
	  elseif input == five then
	  ----- code here
	 end
   elseif input == power then
    term.clear()
    term.setCursorPos(1,1)
    print("--------------------------------------------------")
    print("POWER CONTROL SYSTEM")
    print("--------------------------------------------------")
    print("Choose an option")
    print("")
    print("[1] Turn On Reactor")
    print("[2] Turn Off Reactor")
    print("[3] Block Energy Transfer")
    print("[4] Unblock Energy Transfer")
    print("[5] Exit")
    print("")
    print("--------------------------------------------------")
    print("--------------------------------------------------")
    term.setCursorPos(1,14)
    input = read()
	 if input == force then
	  ---- code here
	  elseif input == power then
	  ----- code here
	  elseif input == gate then
	  ----- code here
	  elseif input == four then
	  ----- code here
	  elseif input == five then
	  ----- code here
	 end
   elseif input == gate then
    term.clear()
    term.setCursorPos(1,1)
    print("--------------------------------------------------")
    print("GATE CONTROL SYSTEM")
    print("--------------------------------------------------")
    print("Choose an option")
    print("")
    print("[1] Open all gates")
    print("[2] Close all gates")
    print("[3] Seal all gates")
    print("[4] Unseal all gates")
    print("[5] Exit")
    print("")
    print("--------------------------------------------------")
    print("--------------------------------------------------")
    term.setCursorPos(1,14)
    input = read()
	 if input == force then
	  ---- code here
	  elseif input == power then
	  ----- code here
	  elseif input == gate then
	  ----- code here
	  elseif input == four then
	  ----- code here
	  elseif input == five then
	  ----- code here
	 end
   elseif input == four then
    term.clear()
    term.setCursorPos(1,1)
    print("--------------------------------------------------")
    print("RESOURCE CONTROL SYSTEM")
    print("--------------------------------------------------")
    print("Choose an option")
    print("")
    print("[1] Turn On sorting Machine")
    print("[2] Turn Off Sorting Machine")
    print("[5] Exit")
    print("")
    print("--------------------------------------------------")
    print("--------------------------------------------------")
    term.setCursorPos(1,12)
    input = read()
	 if input == force then
	  ---- code here
	  elseif input == power then
	  ----- code here
	  elseif input == five then
	  ----- code here
	 end 
   end  
end

You could put functions around the designs so you just have to put resCtrl() for the resource control, and do so for the other functions.

Put quotes around the strings when checking input. (e.g. input == "five").

You could also make it function regardless of resolution, so that the lines of dashes cover the entire screen no matter the width. This could be done like so:

string.rep("-",w)

Where w is the width.