At the bottom of control add a "create a clone of myself" block. Add the "frequency" variable to the "wait 1 second" block, then a "hide" statement to the original to remove it from the screen.
Now that we have clones spawning after a set amount of time, lets tell them what path what path we want to put them on. Grab a "set ____ to 0" block from the variables tab and place it above the "create clone of myself tab" , Set the variable to "path" and lastly change the value from 0 to 1.
Let's grab a "when I start as clone" and "if then" block from Control, then in Operators, we will use the "blank equals 50" block and change it to "path equals 1".