Queue Display

I need a queue display on startup of Android tab (7" and more). Every time on startup, it should display the login screen. It should auto-login after 30 seconds, if login details are stored in the tab. In case I need to create or change the login details, I have to enter Username "new" & Password "setup". If the login is "Display1/Display2" and the password is "token", it ll display the value fetched from mysql table as in the pic3/pic4 on fullscreen refresh the screen every 10-20 sec (time specified in the table). If there is a change in it, it will invert the colors and blink for 5sec with a bell sound.