Saada

This is a visual programming tool to introduce code to beginners. There are 3 
main variables that can be manipulated to draw on the graph: x, y, color. 
Imagine a paintbrush that starts at the origin of the graph (Ctrl + a to view 
axes), you can move the paintbrush to various points in the plane by changing 
the x and y coordinates and naturally change color by setting the color 
variable. 

Global variables:
    
    x                       integer; defines x coordinate of 'paintbrush'
    
    y                       integer; defines y coordinate of 'paintbrush'
    
    color                   string; defines color of 'paintbrush'

Types:

    integer                 e.g. 0, 1, 2, 42

    string                  e.g. "blue", "green", "hello world"

Basic Syntax: 
    comments                # this is a comment
    
    if statement            if(<condition>):
    
    else statement          else:
    
    while loop              while(<condition>):
    
    for loop                repeat <nonnegative number>:
    
    print                   print(<argument>)
    
    variable assignment     <- 

 Using Functions
     
     define a function       def fn_name(arg1, arg2)
     
     return an argument      return <value> 
 
 Debug Syntax and Use:
     
     activate debug mode     Control + D
     
     break statement         break
              
 Draw Syntax:
     
     coordinates for drawing (x,y)
     
     default start point     (0,0)
    
     color of line           color 
     
     draw([width])           draws from second to last point to last point set, 
                             optionally accepts integer argument for line width

 Sample Code:

    def f(t):
         x<-t+10
         color<-blue
         draw
 
     f(10)
     break
 
     def g(n, m):
         repeat n:
             print("this is x")
             print(x)
             x<-x+m
             color<-black
             draw
 
     g(1, 10)
     break
     g(3, 10)