The right/left arrows move the square selector through the binary code.
The Down/Up arrows are If Then checks. If you set the down/up arrow to an empty value nothing is compared and no action is taken. If you set a 1 or a 0 and it matches the bit currently selected by the square selector then the 'code' follows the path it points to.
The refresh button like arrows are loops, number of times is indicated by the small circles inside the arrow.
The 0/1 big circles change the bit to either a 1 or 0. Some of these are toggles so you can set the bit to either.
The aim is to look at the 'code', change the If Thens and bit change toggles in order to match the binary code to the one in the top right as the 'code' runs through and changes the binary code in your selector.
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