Drawing a polygon

Hi im trying to make it so when the user clicks and drags a rectangle will be drawn to the size the user drags but for some reason the polygon will not show up. I posted a picture of the behaviour below.

"Was pressed/released" is only valid once per click/release. Set/unset a boolean to indicate whether the mouse is being held down, and have the drawing routine check that instead.

Hi I made some changes but the shape isnt a rectangle it comes out as some weird diamond shape I will post updated images above.

What's wrong with the draw/fill rect blocks?

As for why you're getting an hourglass shape, that's because you're not defining your coordinates in the right order. It'll draw the vertices in the polygon in the order you provide; you've got the last two backwards.

Um I wanted to make it so you can draw the size of the rectangle and I wasnt sure how to do this with the fill rect blocks. Edit: For some reason when drawing the polygon the rectangle comes out in strange sizes. All I want to do is make a selection rectangle like in real time stratedgy games.

With the rect blocks, you'd calculate the width and height by subtracting the start point from the end point.

EDIT: Check out the attached game.