In this task you are given a list of numbers and you need to find the average of each two consecutive values. The average of two numbers a and b is calculated as: (a + b) /2. The output should be a list of the averages of each two consecutive values. A list is presented with two brackets and comma-separated values, like: [1,2,3].

Example Input: [84, -86, 12, 56, 39, 30]
Example Output: [-1.0, -37.0, 34.0, 47.5, 34.5]

Example Input: [87, 34, 59, -97, -67, -71, -28, -51, 56]
Example Output: [60.5, 46.5, -19.0, -82.0, -69.0, -49.5, -39.5, 2.5]

Example Input: [-17, 73, -25, -67, 56, -30, -98, -65, -57, 35, -17, 64, 99]
Example Output:
[28.0, 24.0, -46.0, -5.5, 13.0, -64.0, -81.5, -61.0, -11.0, 9.0, 23.5, 81.5]