非常简单，出自th95东方文化帖Level EX Scene 4

Create Event:
执行代码:
globalvar ang,i
Step Event:
执行代码:
globalvar a;
a=0
ang+=i
i+=0.2
while(a<=360)
{
a+=72
action_create_object_motion(obj_2,x,y,6,ang+a)
}

我也试过弄这个（其实是乱弄的时候弄出来的）……弄了个有点类似的……不过没你的效果好，代码也更繁琐一点
Create Event:
执行代码:
alarm[0]=60; //这个无所谓，激活计时器就好
dir=90; //初始角度
b=-1;
c=0;
/*注：上面两个变量乱命名的不要在意*/
Alarm Event for alarm 0:
执行代码:
for(i=0;i<360;i+=360/2/difficulty/*注：难度，Easy为1，Normal为2，以此类推*/)
{
with(instance_create(x,y,bullet))
{
direction=other.dir+other.i;
speed=3;
}
}
dir+=7*c;
c+=0.025*b;
if (c>10) b=-1;
if (c<-10) b=1;
alarm[0]=2;

我也弄过的

因为我是一秒60步，子弹又偏大，所以3步一发
if ava==1
{
bul = instance_create(x,y,obj_enebul);
bul.speed = 1.5;
bul.direction = dir;
bul = instance_create(x,y,obj_enebul);
bul.speed = 1.5;
bul.direction = dir+72;
bul = instance_create(x,y,obj_enebul);
bul.speed = 1.5;
bul.direction = dir+144;
bul = instance_create(x,y,obj_enebul);
bul.speed = 1.5;
bul.direction = dir-72;
bul = instance_create(x,y,obj_enebul);
bul.speed = 1.5;
bul.direction = dir-144;
ang -= 0.1
dir = dir+ang
ava = 3
}
else
{
ava -= 1;
}

弹幕即艺术。