console 命令行工具 X clear

console

let x=60; 
let y=5;
var Vx=5; 
var Vy=5; 
function setup() {  
 createCanvas(500, 400); 
}  
 
function draw() {  
 background(120); 
 ellipse(x,y,20,20);
 x+=Vx; 
 y+=Vy; 
  if(x>width||x<0){ 
    Vx*=-1; 
 } 
 if(y>height||y<0){ 
    Vy*=-1; 
 } 
}

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