How to spawn a NPC on Terraria HD

Hello there people of Terraria and such this is 0RandomGamer0 here and uhhh....I am here with a tutorial on how to spawn a NPC on Terraria so yeah.This is my first tutorial and first video and there is many more tutorials to come from me. If you want more tutorials ask me and if you want specific help in terms of Terraria. please subscribe, like, and comment on the video.Thank you people of Youtube :D :D :D :D