Pattern Blocks Simulation

Prompt

Code in html, css, and javascript a simulation that is self-contained, complete, and embeddable that uses the standard pattern block set with infinite editions of each block. Ensure that the blocks are correct dimensionally so that the edge lengths match as they should. Use this site for kindergarten pattern block mats: https://www.prekinders.com/pattern-blocks/ Use this site for slightly more advanced patterns: https://classplayground.com/pattern-blocks/

Iteration

Allow the user to drag the design canvas to move the design to the center of the screen.  Add a download button to allow the user to download a png format copy of their design.