GameMaker How to make an object move in a figure 8 motion

[gamer_essence]

I want to have a atom looking thing move in a figure eight as a loading symbol.

 

[Pfap]

You could try making a figure 8 path and having an instance follow it, while your waiting for whatever you're loading.

 

[BattleRifle BR55]

Have a variable counting up, wrap it with the sine function for each axis, but multiply the variable by 2 on the y axis. Multiply the sien function itself to extend the distance the instance will move on each axis.

 

[FrostyCat]

See: Lissajous curve

Create:

t = 0;
dt = pi/(3*room_speed);
xrad = 120;
yrad = 120;

Step:

x = xstart+xrad*sin(t+pi/2);
y = ystart+yrad*sin(2*t);
t += dt;
if (t >= 2*pi) {
  t -= 2*pi;
}