To complete the code snippet, you can fill in the blank line with the following code:
global x
This line of code declares the variable "x" as a global variable, which means that it can be accessed and modified by any function in the code. This is necessary because the "x" variable in the "draw" function is different from the "x" variable that is defined outside the function, and you want to modify the value of the global "x" variable.
After adding this line of code, the complete code snippet would look like this:
x = 5
def draw(canvas):
global x
x = x + 5
canvas.draw_circle((x,200), 50, 1, color, color)
This code will draw a circle on the canvas, with the center of the circle located at the point (x,200). The value of "x" will be increased by 5 every time the "draw" function is called, which will cause the circle to move to the right by 5 units on the canvas.