UI Challenge 3 - Radio

The last UI challenge is a Radio. The component of the radio are 2 buttons and 2 sliders.

The two buttons which are antenna and the on/off buttons have their own function. The function of the antenna button is to turn on/off the antenna to receive signals. And the on/off button is to control the power of the radio. Another two sliders which are channel slider and volume slider. The function of the channel slider is to adjust the pointer in the channel bar to another channel. By the way, there is only one channel in the radio which is 107.9 Mhz. Therefore, if the pointer points to a channel other than 107.9 Mhz, only noise will be played. If the antenna, only noise will be played as well. The volume slider can adjust the sound volume. When the radio is playing sound, two music symbols will be displayed on its side. However, when the on/off button is off or the volume is too low, these symbols will disappear.