Minecraft command block order I need help in redstone

I would like to make a command block that when he found someone(testfor) in a specific condition (like, survival mode) a redstone signal will appear and activate another command block(the command doesn't matter)

If you can please to post a picture of how this setup (in redstone) should look like I will be pleased.

Solution 1:

Place a command block with the /testfor @p[whatever] command.
Then, a redstone comparator facing outwards from the command block.
From there, place your redstone or any redstone contraption that needs the input.

Note: If the comparator's signal isn't strong enough (1 block worth of power), place a Redstone Repeater after the comparator and any output should now have 15 strength.