HTML EVENT arrtibutes not showing result

MY website dont show result after applying onblur or onchange attributes

kya aap mujhe apana code bhej sakate h

Form Event Attribute First name:

name show nahi hota h value show hoti h box ke andr

Sir ne jaise javascript ka use karke color aur background change kiya mera kuch bhi show nhi ho rha hai

Form Event Attribute First name: ![Screenshot (5)|690x388](upload://rnphwWApsvUdfOLXombLzyZuz27.png)

image show nahi ho rhi h apne code ki image bhejo

Form Event Attribute First name: