How do I fix this storyboard code?

// Christopher Tillack

// Reminder: This code is for a storyboard. A storyboard is a story that lets you makes choices, and changes based on your choices.

#include <stdio.h>

int main(void) 
   {
int characterName;
   char characterName[100];
   int aa;
   printf("Hello. This code will write a story, based on your choice.\n");
   printf("What is the name of your character?\n");
   scanf("%s",characterName);
   printf("Your name is %s",characterName);
   printf("\n");
   printf("One day, while walking through a forest, you encounter a mysterious, entrancing portal. Do you enter it %s", characterName);
   printf("?\n");
   printf("Enter Number 1 to Stay, Number 2 for Entering it.\n");
   scanf("%i",&aa);
  if (aa == 1);
   {
   printf("You chose to stay. END OF STORY.");
   }
 if (aa == 2)  
   {
     printf("You step towards the bright, purple portal.\n It looks like a swirly mirror. You are entranced as you step forward, step after step. Adventures await you.");
   }
   return 0;