Other wires such as data and address consist of a group of wires. Since drawing 16 or 32 or 20 wires, some going high and some going low, would unnecessarily clutter the diagram, we shall use a standard convention in these types of timing diagrams; whenever valid data (logic values which we are interested in) are present on these wires, we draw an elongated diamond shape. This can be seen above on both the address and data wires. Remember that there are 1s and 0s on these wires all the time that the power is on, but they are not valid or interesting 1s and 0s until the diamond starts.