New cryptocurrency (Star Dollar)

Hi, I need someone that can design a cryptocurrency called Star Dollar. it must have its own website that can be used for banking, buying, selling the Star Dollar and to be able to transfer funds to other accounts. The people that sell the Star Dollar must be able to setup there own investors account that allows them to save the Star Dollar and when the price goes up to be able to sell the Star Dollar to other people that have accounts on the website. The price of the Star Dollar will be backed by silver so if I have $100 U.S.D. in silver and 10 Star Dollars in circulation then the price of the Star Dollar will be $10 U.S.D. the exchange rate of the Star Dollar must be able to fluctuate depending on how much silver I have. so if I put into the account that the Star Dollar is being backed by 10 ounces of silver and the price of silver is $20 U.S.D. an ounce then it must automatically add up how much the price will be and it must post it out to the public. It also needs to be able to know how much the price of silver is when it fluctuates it must be able to know and change the exchange rate of the Star Dollar accordingly. I want to be able to set a limit to how many Star Dollars people can get so if I only want 100 Star Dollars to be able to go into circulation then whenever its all been bought no one else can buy anymore until I allow more to be put into circulation.