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Yes I have the non-extra no-missed-out-word answer. I understand the progression. What I don’t know is how to start from the required starting-point, and where to make the first addition of the nature required. I have googled a picture of the required drawing, flipped it round every way, mirror imaged it, etc. I know what must be in the final square, so I know only a permutation which provides that correct entry can be my final square.

candlestick,

The preamble says that you need to draw 6 arcs. In order for this to happen AND for the second instruction to be adhered to, there is only one place that the first arc can end/the second arc can start (based on the abbreviated word in the first instruction). The preamble states you need to add 6 new squares but not where; what if the grid itself relates to the squares added in some way...
I apologise is I'm being ambiguous, I don't want to give it away too overtly