Animated Text in C#

using System.Drawing.Drawing2D;
using System.Drawing.Text;

private void Timer_Tick(object obj, EventArgs ea)
{
	//set the graphics object in the form
	Graphics grafx = CreateGraphics();
 
	//set and determine the size,font and text.
	Font fnt = new Font("Segoe UI", 40, FontStyle.Regular, GraphicsUnit.Point);
	string start_text = "Text Animation"; //APPEAR THE TEXT IN THE FIRST LOAD
	SizeF fnt_size = new SizeF(grafx.MeasureString(start_text, fnt));
 
	//set the text that to be centered in the client area.
	PointF ptf_text_start = new PointF((System.Convert.ToSingle(ClientSize.Width - fnt_size.Width)) / 2, (System.Convert.ToSingle(ClientSize.Height - fnt_size.Height)) / 2);
 
 
	//for the animation effect, set the gradient start and its end point.
	PointF ptf_gradient_start = new PointF(0, 0);
	PointF ptf_gradient_end = new PointF(current_gradient_shift, 130);
 
 
	//use the brush for drawing the text.
	LinearGradientBrush gradient_brush = new LinearGradientBrush(ptf_gradient_start, ptf_gradient_end, Color.Crimson, BackColor);
 
	//the text draw at the centered of the client area.
	grafx.DrawString(start_text, fnt, gradient_brush, ptf_text_start);
	grafx.Dispose();
 
	//reversing the gradient when it gets to a certain value
	current_gradient_shift += gradiant_step;
	if (current_gradient_shift == 500)
	{
		gradiant_step = -5;
	}
	else if (current_gradient_shift == -50)
	{
		gradiant_step = 5;
	}
}

private void Form1_Load(System.Object sender, System.EventArgs e)
{
	Timer1.Start();
	Timer1.Interval = timer_interval;
}