2-drive controller

m = peripheral.wrap("back")
m.open(1)
mon = peripheral.wrap("monitor_2")
mon.clear()
mon2 = peripheral.wrap("monitor_3")
mon2.clear()
p = peripheral.wrap("printer_0")
d = peripheral.wrap("drive_0")
d2 = peripheral.wrap("drive_5")
if d.isDiskPresent() or d2.isDiskPresent() do
  d.ejectDisk()
  d2.ejectDisk()
  m.transmit(1,1,"Ejecting disks...")
end
dvar = false
dvar2 = false
while true do
  mon.setTextColor(colors.green)
  mon2.setTextColor(colors.green)

  mon.setCursorPos(1,1)
  mon.write("Drive 1:")

  mon.setCursorPos(1,3)
  mon.write("Path:")

  mon.setCursorPos(1,5)
  mon.write("Files: ")

  mon2.setCursorPos(1,1)
  mon2.write("Drive 2:")

  mon2.setCursorPos(1,3)
  mon2.write("Path:")

  mon2.setCursorPos(1,5)
  mon2.write("Files: ")

  mon.setTextColor(colors.red)
  mon2.setTextColor(colors.red)

  sleep(0.2)

  if dvar == false then
    if d.isDiskPresent() then
      m.transmit(1,1,"Reading disk on drive: 1")
      dvar = true
      dname = d.getDiskLabel()
      path = d.getMountPath()
      dfiles = fs.list(path)

      mon.clear()

      mon.setCursorPos(1,2)
      mon.write(dname)

      mon.setCursorPos(1,4)
      mon.write(path.."/")

      for i = 1,#dfiles do
        y = i + 5
        mon.setCursorPos(1,y)
        mon.write(dfiles[i])
        sleep(0.5)

      end
      m.transmit(1,1,"Finished reading disk on drive: 1")
    end
  else
    if not d.isDiskPresent() then

      dvar = false
      mon.clear()
      m.transmit(1,1,"Disk removed from drive: 1")
    end
  end
  if dvar2 == false then
    if d2.isDiskPresent() then
      m.transmit(1,1,"Reading disk on drive: 2")
      dvar2 = true
      dname2 = d2.getDiskLabel()
      path2 = d2.getMountPath()
      dfiles2 = fs.list(path2)

      mon2.clear()

      mon2.setCursorPos(1,2)
      mon2.write(dname2)

      mon2.setCursorPos(1,4)
      mon2.write(path2.."/")

      for i = 1,#dfiles2 do
        y = i + 5
        mon2.setCursorPos(1,y)
        mon2.write(dfiles2[i])
        sleep(0.5)
      end
      m.transmit(1,1,"Finished reading disk on drive: 2")
    end
  else
    if  not d2.isDiskPresent() then
      dvar2 = false
      mon2.clear()
      m.transmit(1,1,"Disk removed from drive: 2")
    end
  end
end