Adding multiple code blocks/ piece of code into the header (code injection panel)

Hi all, I am wondering if we could have 2 piece of code in the header 1 for our facebook pixel and 1 for our google campaign (google tag) to track the activities on our website or we could only have 1 piece of code for 1 purpose (either facebook or google).

Thank you ! 

You should able to add multiple script code to Code Injection