Laying horses between certain odds - help required

[Coldturkey]

Hi,
I'm new enough to Bet Angel Pro and decided to give it a go. I would like a bit of help to get started.

Basically my strategy is:
Lay a horse between odds of say 3.0 - 4.0.If horse loses,bank your money and start again.

If he wins,go to next horse race that matches the odds above and lay the horse odds of 3.0 -4.0. The stake will be dependant on how was much was lost in the previous race.

I will only continue the strategy for 3 wins in row and start again.

Does anyone have a spreadsheet that could do the above?

Thanks
CT