Boshy-inspired jump trigger spikes.

So basically, have 4 different objects for each directional spike. Put the corresponding creation event in each one, but you can keep the same step event.

Create Event:
//Put in all moving spikes
sX=x;
sY=y;

//Down-spike version (Only put this in each respective directional spike)
tY=y-32;
//Up-spike version
tY=y+32;
//Right-spike version
tX=x-32;
//Left-spike version
tY=x+32;

Step Event:
If keyboard_check_direct(vk_shift){
	transitioning=1;
	way=!way;
}
if transitioning=1{
	sineAngle=min(sineAngle+4,90);
	if way=0{
		sine=1-sin(degtorad(sineAngle));
	}else{
		sine=sin(degtorad(sineAngle));
	}
	x=lerp(sX,tX,sine);
	y=lerp(sY,tY,sine);
	if sineAngle=90{
		transitioning=0;
		sineAngle=0;
	}
}