I have checked a newer version into TFS (Source Code tab). It includes using expressions regarding math (add,subtract,multiply,divide,do square root,use pi ) and string concatenations when writing to the console. Now a command like Console.WriteLine(Sqrt|144 * 2 -1); is possible. But do not use "." or "+" in a string constants directly in writeline or statements (if and loops) functions to reduce errors. instead put the string in a varible, then use 6=the variable and all will go well. Get the code from TFS. This version is a beta. Plese also note the FileSystem functions have been included. With rhe next sttable release there will. be a report update so yoou could see the mewest XMLmosaic capabiluty.