local currentX = 1 --Saves the current X of the cursor
local currentY = 1 --Saves the current Y of the cursor


function drawCursor()
  term.clear() --Clears the screen
  term.setCursorPos(currentX, currentY)  --Draws a cursor at the current X/Y
  write(">")
end


while true do
  drawCursor()
  local e,key, char = os.pullEvent( "key" )
  if e == "key" then
    if key == 17 or key == 200 then --up
          currentY = currentY -1
    elseif key == 31 or key == 208 then --down
          currentY = currentY +1
    elseif key == 203 or key == 30 then --left
          currentX = currentX -1
    elseif key == 205 or key == 32 then --right
           currentX = currentX +1
    end
  elseif e == "char" then
    term.setCursorPos(currentX +1, currentY)
    write(char)
  end
end