We can create an empty rectangle
on a canvas using strokeRect(). This
rectangle will have a black border.
Take a look at this example:
As you can see, we provide
four arguments to the strokeRect() method.
These are the values for the
x-coordinate, y-coordinate, width
and height respectively for the
rectangle.
So, in the above example,
the rectangle's upper-left corner is
at 30 on the x-axis, the rectangle's
upper-left corner is at 25 on the y-axis,
the width of the rectangle is 50px and
the length of the rectangle is 100px.