how to generate some simultaneous equation series?

[tony]

such as

y=100-!alpha*(r-!rpo)+e 'the demand for goods and services
r=i-pi 'the fisher equation
pi=pi(-1)+!phi*(y-100)+v 'the phillips curve
i=pi+!rpo+!theta_pi*(pi-2)+!theta_y*(y-100) 'the monetary-policy rule
SO my question is how to gain these time series of y,r,pi and i.
plz help me.
thank you very much