Need to create a AUTO-FIB indicator

Hi, I'm wanting to make an indicator that automatically draws a fib on each current candle on the current time frame that im on and keeps adjusting the fib as the candle gets bigger.. and will automatically erase it when the next candle starts.. so its always measuring the current candle. also need it to automatically draw the fib in the correct direction (from top to bottom on a red candle and from bottom to top on a green candle) also would like the option to set the parameters of the fib numbers that I want to use. and also would like an option to select the number of previous candles to keep the fib on before automatically erasing them. also I would like the indicator to only display the fib lines on the candle that way chart isn't cluttered.