Picturebox not moving properly

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C#

application

Hey everyone,

I made a very simple little application to test making an object appear to jump on a button press, and it works fine however the picture box I'm making jump appears to be staying in the starting position as well as jumping. I tried to search for an answer but wasn't quite sure how to describe the problem. The problem is like this:

Visual of problem

Here's the code:

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

namespace Jumping
{
    public partial class Form1 : Form
    {
        bool jumping = false;
        bool falling = false;
        int startingElevation = 0;

        public Form1()
        {
            InitializeComponent();
            Timer Clock;
            Clock = new Timer();
            Clock.Interval = 1;
            Clock.Start();
            Clock.Tick += new EventHandler(Timer_Tick);
            InitializeComponent();
        }

        public void Timer_Tick(object sender, EventArgs eArgs)
        {
            int currentElevation = PBObject.Top + PBObject.Height;

            if (jumping == true)
            {
                if ((currentElevation > (startingElevation - 20)) && (currentElevation <= (startingElevation)))
                {
                    PBObject.Top -= 5;
                }
                else if ((currentElevation > (startingElevation - 40)) && (currentElevation <= (startingElevation - 20)))
                {
                    PBObject.Top -= 4;
                }
                else if ((currentElevation > (startingElevation - 60)) && (currentElevation <= (startingElevation - 40)))
                {
                    PBObject.Top -= 3;
                }
                else if ((currentElevation > (startingElevation - 80)) && (currentElevation <= (startingElevation - 60)))
                {
                    PBObject.Top -= 2;
                }
                else if ((currentElevation > (startingElevation - 100)) && (currentElevation <= (startingElevation - 80)))
                {
                    PBObject.Top -= 1;
                }
                else if (currentElevation <= (startingElevation - 100))
                {
                    jumping = false;
                    falling = true;
                }
            }
            else if (falling == true)
            {
                if ((currentElevation >= (startingElevation - 100)) && (currentElevation < (startingElevation - 80)))
                {
                    PBObject.Top += 1;
                }
                else if ((currentElevation >= (startingElevation - 80)) && (currentElevation < (startingElevation - 60)))
                {
                    PBObject.Top += 2;
                }
                else if ((currentElevation >= (startingElevation - 60)) && (currentElevation < (startingElevation - 40)))
                {
                    PBObject.Top += 3;
                }
                else if ((currentElevation >= (startingElevation - 40)) && (currentElevation < (startingElevation - 20)))
                {
                    PBObject.Top += 4;
                }
                else if ((currentElevation >= (startingElevation - 20)) && (currentElevation < (startingElevation)))
                {
                    PBObject.Top += 5;
                }
                else if (currentElevation >= startingElevation)
                {
                    falling = false;
                    PBObject.Top = startingElevation - PBObject.Height;
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if ((jumping == false) && (falling == false))
            {
                startingElevation = PBObject.Top + PBObject.Height;

                jumping = true;
            }
        }
    }
}

Is the problem something to do with needing to refresh the form or something?

If anyone has an answer I'll be very grateful!