# [sed], <s>39</s> 38 bytes

    s/.*/echo {0..&}/e  #0 to n seperated by spaces
    s/[^ ]//g           #only keep the spaces
    y/ /1/              #spaces to 1s
    a0                  #append a 0

[Try it online!][TIO-luzdfiai]

[sed]: https://www.gnu.org/software/sed/
[TIO-luzdfiai]: https://tio.run/##K05N0U3PK/3/v1hfT0s/NTkjX6HaQE9PrVY/latYPzpOIVZfP52rUl9B31CfK9Hg/38TAA "sed – Try It Online"