fromstart	left	right
0.0		1.2		1.2
780		2.15	2.15
1350	1.2		1.2
1750	2.15	2.15
2050	1.2		1.2
3000	2.15	2.15
3300	1.2		1.2
4000	2.15	2.15
4200	1.2		1.2