design of login-username and password

Question

Hi,

 

I have a design where i want to take username at first then after username i want user to enter password. Can you please help with some demo code/template.

 

attached is the design link -

 

https://assets.materialup.com/uploads/dacbd26b-f6df-4ceb-8e4d-80725587e6a3/preview.gif

 

i want something like above gif image. 

 

Thanks,