]<script>
var q=40;
var r=(q*3.1415926)/180
var v=new Array()
var l=new Array()
v[0]="0,400,0"
v[1]="100,350,15"
v[2]="200,400,0"
v[3]="0,400,300"
v[4]="100,350,285"
v[5]="200,400,300"
v[6]="30,400,30"
v[7]="30,450,30"
v[8]="170,450,30"
v[9]="170,400,30"
v[10]="30,400,270"
v[11]="30,450,270"
v[12]="170,450,270"
v[13]="170,400,270"
v[14]="170,410,210"
v[15]="170,450,210"
v[16]="170,410,230"
v[17]="170,450,230"
v[18]="170,400,100"
v[19]="170,430,100"
v[20]="170,400,130"
v[21]="170,430,130"
v[22]="170,415,100"
v[23]="170,415,130"
v[24]="170,400,115"
v[25]="170,430,115"
v[26]="400,410,0"
v[27]="400,415,0"
v[28]="400,430,0"
v[29]="390,420,5"
v[30]="410,420,0"
v[31]="390,450,5"
v[32]="410,450,0"
l[0]=Array(0,1)
l[1]=Array(1,2)
l[2]=Array(2,0)
l[3]=Array(3,4)
l[4]=Array(4,5)
l[5]=Array(5,3)
l[6]=Array(0,3)
l[7]=Array(1,4)
l[8]=Array(2,5)
l[9]=Array(6,7)
l[10]=Array(7,8)
l[11]=Array(8,9)
l[12]=Array(10,11)
l[13]=Array(11,12)
l[14]=Array(12,13)
l[15]=Array(7,11)
l[16]=Array(8,12)
l[17]=Array(14,15)
l[18]=Array(14,16)
l[19]=Array(16,17)
l[20]=Array(18,19)
l[21]=Array(18,20)
l[22]=Array(19,21)
l[23]=Array(20,21)
l[24]=Array(22,23)
l[25]=Array(24,25)
var lr=new Array()
lr[0]=Array(26,28)
lr[1]=Array(27,29)
lr[2]=Array(27,30)
lr[3]=Array(28,31)
lr[4]=Array(28,32)
function $(obj){return document.getElementById(obj)}
function getxy(s){
var t=s.split(",")
var a=new Array()
a[0]=t[0]-0+t[2]*Math.cos(r)
a[1]=t[1]-t[2]*Math.sin(r)
return a.join()
}
function setline(){
var str=""
for(var i=0;i<l.length;i++){
str+="<v:line from =\""+getxy(v[l[i][0]])+"\" to = \""+getxy(v[l[i][1]])+"\" strokeColor=\"Gray\"/>"
}
$("box").innerHTML=str
}
function set_jd(s){
q=s
r=(q*3.1415926)/180
setline()
set_ren()
}
function set_ren(){
var str=""
for(var i=0;i<lr.length;i++){
str+="<v:line from =\""+getxy(v[lr[i][0]])+"\" to = \""+getxy(v[lr[i][1]])+"\">"
if(i==0)
str+="<v:stroke StartArrow=\"Oval\"/>"
str+=""
}
$("ren").innerHTML=str
}
var timer;
function Run (n)
{
Stop();
timer = window.setInterval(function(){set_jd(q+n)},200);
}
function Stop ()
{
window.clearInterval(timer);
}
setline()
set_ren()
Run(+1)
</script>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
