Answer:
just like this;)
\red{ \rule{5pt}{70pt}} \orange{ \rule{5pt}{60pt}} \color{yellow}{ \rule{5pt}{50pt}} \green{ \rule{5pt}{40pt}} \blue{ \rule{5pt}{30pt}} \purple{ \rule{5pt}{9pt}} \red{ \rule{5pt}{9pt}} \orange{ \rule{5pt}{10pt}} \color{yellow}{ \rule{5pt}{40pt}} \green{ \rule{5pt}{50pt}} \blue{ \rule{5pt}{60pt}} \purple{ \rule{5pt}{70pt}}
