Example Saves:

(Paste into the "load" box and click load.)

Sun, Planet, and Moon system.

{Earth:{color:"#00FF88",mass:81,radius:20,xPos:880,yPos:0,xVel:0,yVel:240},Sun:{color:"#FFFF88",mass:6561,radius:240,xPos:0,yPos:0,xVel:0,yVel:-3},Moon:{color:"#FFFFFF",mass:1,radius:5,xPos:910,yPos:0,xVel:0,yVel:400}}

Sun and two planets system.

{Sun:{mass:162,color:"#FFFF88",radius:40,xPos:0,yPos:0,xVel:-0.25,yVel:-3.5},Earth:{mass:4,color:"#00FF88",radius:10,xPos:100,yPos:0,xVel:0,yVel:120},Mars:{mass:1,color:"#880000",radius:5,xPos:350,yPos:0,xVel:0,yVel:60}}