Using Qt4 to implement a butterfly kept flying up and down the example shows.

ButterflyItem\buterflyitem\buterflyitem.pro
.............\............\buterflyitem.pro.user
.............\............\butterfly.cpp
.............\............\butterfly.h
.............\............\butterfly.ui
.............\............\main.cpp
.............\............-build-desktop\debug\buterflyitem.exe
.............\..........................\Makefile
.............\..........................\Makefile.Debug
.............\..........................\Makefile.Release
.............\..........................\ui_butterfly.h
.............\..........................\debug
.............\..........................\release
.............\buterflyitem
.............\buterflyitem-build-desktop
ButterflyItem

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