Trendline Drawing tool/EA

Hi,

i´m often drawing various trends in my charts. I sucks bad that i have to click on the "line" symbol every time i draw ONE line, i´m looking for a possibility to draw many lines without clicking the button again and again. I want 8 little boxes with 8 colours, after choosing one of them i should be able to draw as many lines i want till i click again on the box or choose another color. I have made a video for better showing what i mean:

https://youtu.be/zA_M5DEH2uU

Would be happy if someone is able to code this!