i can remember when i did this as a child when i was in primary school, this is basically what i want my installation to explain but by making my own shadows with different objects
http://www.jgiesen.de/hsd/hsd300.html
http://www.mysundial.ca/tsp/horizontal_sundial.html
https://cms.qut.edu.au/__data/assets/pdf_file/0017/24092/create-sundial-teacher-worksheet.pdf
horizontal sundial times for worksop
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