C2F
1. take input C degree (textbox)
2. Do the Conversion
    F = C x 9 / 5 + 32
3. If C > 30 Then write "Hot" to Label3 and change color to red
4. If C < 15 Then write "Cold" to Label3 and change color to blue
5. Otherwise Write "Good" to Label3 and change color to orange
F2C
1. take input F degree  
2. Do the Conversion
    C = (F -32 ) x 5 / 9
3. If C > 30 Then write "Hot" to Label3 and change color to red
4. If C < 15 Then write "Cold" to Label3 and change color to blue
5. Otherwise Write "Good" to Label3 and change color to orange