class Duration:
	def __init__(self):
		self.hour=0
		self.min=0
		self.sec=0
	
	# Set the duration
	# Takes nano-seconds
	def setTime(self,ns):
		# Convert to seconds
		time = ns/1000000000
		# Hours
		if time >= 3600:
			self.hour = time/3600
			time = time-(self.hour*3600)

		# Minutes
		if time >= 60:
			self.min = time/60
			time = time-(self.min*60)

		# Seconds
		self.sec = time


	# Write time to screen
	def toStr(self):
		time = ""
		if self.hour > 0:
			time+=str(self.hour)+":"

		if self.min > 0:
			min = str(self.min)
			if self.min < 10:
				min = "0"+min
			time+=min
		else:
			time+="00"
		time+=":"

		if self.sec > 0:
			sec = str(self.sec)
			if self.sec < 10:
				sec = "0"+sec
			time += sec
		else:
			time+="00"
		return time


	def disp(self,prnt):
		time = self.toStr()
		prnt([time])