You can put several commands in sequence to turn on the output ports one after the other. Also, the command ab, selects both outpus together.
turns on output A and B for 1 second.
turn on output A for 1 second, then output B for 1 second.
The first time the Virtual Cricket loads there will be a
Please be patient.
Now, you type. Enter a command to turn A on for 2 seconds, then reverse direction, then go for 2 seconds more. Then click the Try it button to try it out.