move of random point

hi everybody !

i work on a architecture student exercice , i'm just begin to use grasshopper. the principe is to work on Ribbon . and i want to create many point on a line to split my ribbon . but i wanna create each point by two different factor . the first factor is a point that must be create by the point before  . 

and the second is : each point must be separated by a distance on my list ( i have 6 distance different distance on my list ) but the distance must be use by random operation . 

you can see on the pics my first test with only random divide and random distance .

the principe is the same but i want the distance between each point to be controlated by my list . but the order of each distance must be random .

so sorry if my english are bad is not my first langage and i hope some help for this exercice !