The name 'g' does not exist in the current context

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace EtchaSketch
{
    public partial class Form1 : Form
    {
        int x = 50, y = 50;     // starting position
        Bitmap bm;
        int x1 = 50, y1 = 50;
   

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        { 
            bm = new Bitmap(this.Width, this.Height);   // create a form-size bitmap
            Graphics g = Graphics.FromImage(bm);        // get a graphic object for the bitmap
            g.FillEllipse(Brushes.Blue, x, y, 20, 20);  // put a circle in the bitmap
            this.BackgroundImage = bm;                  // use the bitmap as the form background
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = Graphics.FromImage(bm);        // get a graphic object for the bitmap
            g.FillEllipse(Brushes.Blue, x1, y1, 20, 20);
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            string input;
            input = keyData.ToString();

            if (input == "Down")
            {
                y1 = y1 + 10;

                
                Refresh();
                
                return true;
                
            }
            if (input == "Up")
            {
                y1 = y1 - 10;


                Refresh();

                return true;

            }
            if (input == "Left")
            {
                x1 = x1 - 10;


                Refresh();

                return true;

            }
            if (input == "Right")
            {
                x1 = x1 + 10;


                Refresh();

                return true;

            }
            if (input == "C")
            {
                
                g.Clear(BackColor);


                Refresh();

                return true;

            }
          

            return false;    // return true if key processed, otherwise false
        }
    }
}