//@code
objref g	//Creates an object reference "g" which will
		//point to the graph object.
g = new Graph()		//Assigns "g" the role of pointing to a Graph
			//created from the Graph class, and produces
			//a graph window with x and y axes on the 
			//screen.
g.size(-4,4,-4,4)	//sizes the window to fit the graph
t = 0		//Declares t as a possible variable
g.addexpr("3*sin(t)")	//stores 3*sin(t) as a function to be plotted in g graphs
g.color(3)		//the next graph will be drawn in blue
g.addexpr("3*sin(2*t)") //stores 3*sin(2*t) as a function to be plotted
g.xexpr("3*cos(t)")	//stores 3*cos(t) as the x function to be plotted in g graphs
			//sin(x) becomes the y function
g.begin()		//Tells the interpreter that commands to plot 
			//specific functions will follow.
for(t=0; t<=2*PI+0.1; t=t+0.1){	//States that x values to be plotted
				//will go from 0 to 10 in increments
				//of 0.1.
	g.plot(t)	//States that the y values on the plot
			//will be the sin of the x values.
}
g.flush()	//Actually draws the plot on the graph in the window.