C# 窗体中显示字符变换大小及来回移动求助

一个label，一个timer，自己找个位置写timer的start(); timer的interval = 1000；

public int i = 10;
public bool flag = true;

private void timer1_Tick(object sender, EventArgs e)
{

if (i != 40 && flag == true)
{
label1.Font = new Font("宋体", i+=5);
}
else
{
flag = false;
label1.Font = new Font("宋体", i -= 5);
if (i == 10)
{
flag = true;
}
}
}

bool Fx = false;//标示方向 private void timer1_Tick(object sender, EventArgs e) { if (button13.Left + button13.Width < 0) { button13.Left = button13.Left + 1; Fx = true; } else { if (button13.Left < this.Width) { if (Fx) { button13.Left = button13.Left + 1; } else { button13.Left = button13.Left - 1; } } else if (button13.Left == this.Width) { Fx = false; button13.Left = button13.Left - 1; }