gistfile1.lua

function LevelUpDraenorTalent_SpinnerUpdate(self, elapsed)
	self = self:GetParent():GetParent();
	-- Shifts 512 pixels every .57 seconds, 898.246 pixels every second
	self.shift = 898.246 * elapsed;
	self.move = self.shift / 512;

	if (not self.reset) then
		self.left = self.left + self.move;
		self.right = self.right + self.move;

		if (self.right > 1) then
			local diff = self.right - 1;
			self.right = 1;
			self.left = self.left + diff;

			self.reset = true;
		end
		self.SpinningPlateLeft:SetTexCoord(self.left, self.right, 0, 1);
	else
		self.rightWidth = self.rightWidth + self.shift;
		self.leftWidth = self.leftWidth - self.shift;

		self.SpinningPlateLeft:SetWidth(self.leftWidth);
		self.SpinningPlateRight:SetWidth(self.rightWidth);

		if (self.leftWidth <= 0) then
			self.SpinningPlateRight:Hide();
			self.SpinningPlateLeft:SetWidth(self.beginWidth);
			self.SpinningPlateLeft:SetTexCoord(self.beginLeft, self.beginRight, 0, 1);

			self.leftWidth = self.beginWidth;
			self.rightWidth = 0;

			self.left = self.beginLeft;
			self.right = self.beginRight;

			self.reset = false;
		else
			self.SpinningPlateRight:Show();
			self.left = self.left + self.move;

			self.SpinningPlateLeft:SetTexCoord(self.left, self.right, 0, 1);

			local tLeft = 0; -- always 0, this is the reset one
			local tRight = self.rightWidth / 512;
			self.SpinningPlateRight:SetTexCoord(tLeft, tRight, 0, 1);
		end
	end
end