config.txt

// Code for Blink simulation on iPad

// ------------------------------------
 // Simple Configure Cell Function
 // ------------------------------------
 
 var vacThreshold = 0.999

 public func configureCell(cell: Cell) {
     
     let threshold = 1.0 - 0.1 * Double(cell.numberOfAliveNeighbors)
     
     switch cell.state {
     
     case .alive:
         // Cell has virus
         cell.state = .alive
     case .dead:
         //  Case is used to represent cells that have been vaccinated
         cell.state = .dead
     case .idle:
         
         let vacRandom = Double.random(in: 0.0 ... 1.0)
         if vacRandom > vacThreshold {
             cell.state = .dead
         }
         
         //  Cell does NOT have virus
         
         let random = Double.random(in: 0.0 ... 1.0)
         if random > threshold {
             if cell.state != .dead {
                 cell.state = .alive
             }
         }
         
         let randomTraveler = Double.random(in: 0.0 ... 1.0)
         //  Make 0.9999 below be a threshold constant
         if randomTraveler > 0.9999 {
             cell.state = .alive
         }
         
     }
     
     vacThreshold -= 0.0000001
 }