Write a code for an LPC$2138/2148$ on Keil software where when SW $1$ SW$2$ SW $3$ are off all LEDs are OFF

When SW $1$ is ON and SW $2$ IS OFF SW $3$ OFF RED LED flashes every $3$ seconds.

When Sw $2$ and Sw $3$ are on Green LED flashes every $1$ second

when Sw $1$ and SW $2$ are on both LEDS FLASHES EVERY $3$ SECONDS

WHEN ALL Switches are ON all LEDs flashes every $1$

PROVIDE circuit in Proteus.