gistfile1.m

#import "MSAppDelegate.h"

@implementation MSAppDelegate

@synthesize lifxContext, lastKeyPress;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    self.lifxContext = [[LFXClient sharedClient] localNetworkContext];
    self.lastKeyPress = CACurrentMediaTime();
    [NSEvent addGlobalMonitorForEventsMatchingMask:(NSKeyDownMask) handler:^(NSEvent *event){
        NSTimeInterval keyPressElapsed = CACurrentMediaTime() - self.lastKeyPress;
        NSTimeInterval duration = 0.8 + 40*(keyPressElapsed*keyPressElapsed); //(10*keyPressElapsed - 1)/keyPressElapsed;
        if ([event isARepeat]) {
            duration = 1.4;
        } else if (duration < 0) {
            duration = 0;
        } else if (duration > 5) {
            duration = 5;
        }
        NSLog(@"Last key press: %f | time elapsed: %f | duration: %f", self.lastKeyPress, keyPressElapsed, duration);
        for (LFXLight *light in lifxContext.allLightsCollection.lights) {
            LFXHSBKColor *color = [LFXHSBKColor colorWithHue:arc4random()%360 saturation:1.0 brightness:1.0];
            [light setColor:color overDuration:duration];
        }
        self.lastKeyPress = CACurrentMediaTime();
    }];
}

@end