Can you name the plot, something like heatmap? So I can export it and add it to Moodle?

Sorry for the late reply. Is something like this fine for your purpose? Otherwise feel free to modify it in the way you find it more convenient.

Haha!! Sorry, I didn't explain it clearly at all. I meant heatmap = Plot.plot( ... That way I can export the cell called "heatmap". I can't change it myself cause you're on a free account.

Done :)