I have problem with my script

Hello, So basically im a begginer scripter, like for 5 days i guess. So i basically have a couple problems with my script. (Its some basic script)
Heres the script:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

{
Public int Speed = 200:

{
if.Speed = 200
debug log(Hello);
}
}


Heres the problems:
Assets\Variables.cs(5,1): error CS1022: Type or namespace definition, or end-of-file expected
Assets\Variables.cs(6,5): error CS0116: A namespace cannot directly contain members such as fields or methods
Assets\Variables.cs(6,26): error CS1002: ; expected
Assets\Variables.cs(6,26): error CS1022: Type or namespace definition, or end-of-file expected
Assets\Variables.cs(9,12): error CS0116: A namespace cannot directly contain members such as fields or
methods
Assets\Variables.cs(9,17): error CS1022: Type or namespace definition, or end-of-file expected
Assets\Variables.cs(10,24): error CS1001: Identifier expected
Assets\Variables.cs(11,5): error CS1022: Type or namespace definition, or end-of-file expected
Assets\Variables.cs(12,1): error CS1022: Type or namespace definition, or end-of-file expected
Assets\debug log lmao.cs(7,20): error CS1002: ; expected

 

How to report problems correctly in the Unity3D forums:

http://plbm.com/?p=220

 

There isn't a class name or any functions.