Need HELP coding this SCRIPT. Thanks

Can anyone help me colour code the oscillator and also an overlay on the chart mirroring the oscillator.

If the Oscillator closes above -90 / below - 10 Turns white & Also the Candlestick
If the Oscillator then closes between the -30/-70 within only the next bar to turn BLUE within the Oscillator/ Candlestick!

Thanks it's pretty basic but new to coding!!