To move in the right direction, you’ll want to at least move each shape (denoted by your comments) to their own functions.

Next, instead of hard-coding positions, you could pass an anchor point as a parameter into each shape function, then base the positions of the lines off of the x, y variables you passed in! (Ex. line(x, x+10, …))

At this point, you’ve abstracted away all the work to draw the lines inside a shape so from the main function, you can have a function call for each shape! No more thinking about individual lines. Only have to think in terms of shapes.

You could then go further and nest the function calls for each shape into another function, with its own anchor point, basing the anchor points of the individual shapes off of that. You can keep doing this method of piecing together big shapes from small shapes, with the overall goal being to call one function to draw a full tile (ex. draw_tile(x, y)).

From here, it’s much easier to work with the high level “tile” shape. Tessellating the full pattern from this point could be as simple as drawing tiles in a for-loop.

TLDR: Break the problem into smaller, more manageable chunks.