I have a web page written in PHP and MySQL. This page allows a buyer to make an offer on a piece of artwork.
I need a meter or guage to display how close an offer for an artwork is to the temptation price specified by the seller. The price is not visible to the buyer, but the meter will tell the buyer how close he is to the temptation price. I would prefer the "meter" to be a scale or seesaw (I can get some else to do the artwork). The code has to be able to accept some variables or parameters. For example, the temptation price, the buyers offer and a percentage off the price that will tip the scale or see saw.
If the offer is with x% of the temptation price the scale or seesaw will be even, if it's over x% of the temptation price then the scale or meter will tip over.