Yeah exactly, I would like to store the value of "pulseWidth" in the array "pulseWidths" going from element 0>254 till the array is full then stop reading the sensor data and serial print the values stored within the array. I believe the measurement of the pulse widths is fluctuating whereas is should be constantly 74 micro seconds (as it is when I measure it with the oscilloscope). But I cannot tell this without saving the data to be read after the loop has ran for a good number of cycles to see if the value pulseWidth changes.