public function run()
 {
     Activity::truncate();
     $this->faker = Faker::create();
     $users = User::all();
     $activities = [['name' => 'sleep', 'color' => '#5cb85c'], ['name' => 'work', 'color' => '#5bc0de']];
     foreach ($users as $user) {
         $this->user = $user;
         foreach ($activities as $activity) {
             $temp = new Activity(['name' => $activity['name'], 'color' => $activity['color']]);
             $temp->user()->associate($user);
             $temp->save();
         }
     }
 }