The output will repeatedly change from high to low at a set frequency.
To calculate the values, select C1 first, depending on the frequency you want, by following this guide:
1Hz to 100Hz
= 470nF,
100Hz to 10KHz = 4.7nF,
10KHz to 1MHz
= 100pF
Then rearrange the formula to find R1 as follows
R1 = 1 / (2.2 x Frequency x C1)
Finally make RB = 10 x R1
To ensure that the caluclations are correct, use either Mohms & uF or Ohms & Farads as units