Question about Start() function

Hi there, if i have for example 4 objects in Hierarchy and each object have Script Component with Class and Start() function so whats the order of execution of this function ? Randomly or with Objects Hierarchy ? can i manipulate this order somehow ?

Objects Hierarchy have no effect on Start() functions.Start functions are called randomly.

The 4 GameObject’s would run at the same time, to get an object to do something before “Start()” use “Awake()”

I think what you are looking for is the script execution order: Unity - Manual: Script Execution Order settings

You can set up Edit → Project Settings → Script Execution Order.

But usually you can avoid setting up this using Start or Awake in your scripts. Awake is always executed before Start. Check the execution order table.