Is it possible to condense this Actionscript?

programming flash
1 

swatch1.onEnterFrame = function () {
	this._rotation += (-3 - this._rotation)/speed;
	if (this._rotation<=-3) {delete this.onEnterFrame;}
}

swatch2.onEnterFrame = function () {
	this._rotation += (-6 - this._rotation)/speed;
	if (this._rotation<=-6) {delete this.onEnterFrame;}
}

swatch3.onEnterFrame = function () {
	this._rotation += (-9 - this._rotation)/speed;
	if (this._rotation<=-9) {delete this.onEnterFrame;}
}

swatch4.onEnterFrame = function () {
	this._rotation += (-12 - this._rotation)/speed;
	if (this._rotation<=-12) {delete this.onEnterFrame;}
}

Sorry for this noob Q, but is it possible to condense this Actionscript? Is it possible to use a loop or something?
Thanks for the Help!!!