+5v                                        +5v
---                                        ---
 |                          ____________    |
 +-----------(1k ohm)---+--|p1.0     VCC|---+
 |                      |  |            |   |
 +---(led)---(inverter)-+  |            | (1µf)
 |                         |            |   |
 +-----------(1k ohm)---+--|p1.1        |  gnd
 |                      |  |            |
 +---(led)---(inverter)-+  |            |