I’ve already tried to help you understand how Chain.spend works - here: Contract transfer problem
But in essence:
// deposit ae into the contract
Chain.spend(Contract.address, Call.value)
Will move tokens from Contract.address to Contract.address so it seems pretty pointless.
And then:
// if(account.time <Chain.timestamp)
Chain.spend(Call.caller, account.number)
will move tokens to Call.caller not sure that is what you intended either…