If you have the issue of not being able to sample colors from your browser it's probably because hardware acceleration is turned on in your browser settings. Turn it off and it should be working
0:15 'A' direct selection tool 2:45 Polygon Tool (Click anywhere on canvas, then sides to '8') 2:49 Hold left mouse button, then move 3:02 Copy, then Copy to front (Command + C, then Command + F) 3:13 Duplicate (Hold Alt, then Click left mouse button and Drag. Optional, Hold Shift to make it Align/Straight) 3:30 Press 'X' to toggle between Fill and Stroke 3:32 Press '/' to change Stroke color to none 4:05 'I' for Eyedropper Tool, Left Click to change color 4:40 Right Click
by the way I made a mistake sticking a sticker on a dried wall (that's why I was kinda struggling pulling the making tape out). Usually, it is a straight forward process.