Once the device is powered up (after a reset) the bootloader will wait for a certain amount of time before it goes about executing the program that it has stored. This is the time span that the arduino application uses to load up your new program.
Once the device is powered up (after a reset) the bootloader will wait for a certain amount of time before it goes about executing the program that it has stored. This is the time span that the arduino application uses to load up your new program.