From Tapestries MUCK
Acts as a counting loop, like BASIC's for loops. The varname is the name of the variable that it will create and use to store the count value. The start value will be the initial value of the variable, and the end value will be the value that the variable is working towards.
The increment is how much the variable will be incremented by in each loop. The command will be evaluated for each value of the variable between the beginning and ending values.
will echo a countdown from ten to one, inclusive, to the user.