Answers
Changes the thickness of the lines drawn by the turtle, and can also be written as turtle.width().
Tells the program where a shape begins, so that the shape can be filled once it is drawn.
Sets the colour that will be used to fill shapes, and must be called before starting the fill.
Sets the colour of the lines the turtle draws, and can be used many times in one program.
Python writes the word color rather than colour in its commands, so the British spelling causes an error.
Closes and fills the shape, and comes straight after it is drawn or the shape stays empty.